diff --git a/addons/website/models/website.py b/addons/website/models/website.py
index 41565fb031a..a5ff58608c1 100644
--- a/addons/website/models/website.py
+++ b/addons/website/models/website.py
@@ -654,7 +654,7 @@ class Website(models.Model):
 
     @api.model
     def is_public_user(self):
-        return request.env.user.id == request.website.user_id.id
+        return request.env.user.id == request.website._get_cached('user_id')
 
     @api.model
     def viewref(self, view_id, raise_if_not_found=True):
diff --git a/addons/website_forum/controllers/main.py b/addons/website_forum/controllers/main.py
index 51a4c00b0c1..c3d229135e6 100644
--- a/addons/website_forum/controllers/main.py
+++ b/addons/website_forum/controllers/main.py
@@ -235,8 +235,6 @@ class WebsiteForum(WebsiteProfile):
         if question.state == 'pending' and user.karma < forum.karma_post and question.create_uid != user:
             raise werkzeug.exceptions.NotFound()
 
-        # increment view counter
-        question.sudo().set_viewed()
         if question.parent_id:
             redirect_url = "/forum/%s/question/%s" % (slug(forum), slug(question.parent_id))
             return werkzeug.utils.redirect(redirect_url, 301)
@@ -245,13 +243,17 @@ class WebsiteForum(WebsiteProfile):
         values.update({
             'main_object': question,
             'question': question,
-            'can_bump': (question.forum_id.allow_bump and not question.child_ids and (datetime.today() - question.write_date).days > 9),
+            'can_bump': (question.forum_id.allow_bump and not question.child_count and (datetime.today() - question.write_date).days > 9),
             'header': {'question_data': True},
             'filters': filters,
             'reversed': reversed,
         })
         if (request.httprequest.referrer or "").startswith(request.httprequest.url_root):
             values['back_button_url'] = request.httprequest.referrer
+
+        # increment view counter
+        question.sudo().set_viewed()
+
         return request.render("website_forum.post_description_full", values)
 
     @http.route('/forum/<model("forum.forum"):forum>/question/<model("forum.post"):question>/toggle_favourite', type='json', auth="user", methods=['POST'], website=True)
diff --git a/addons/website_forum/models/forum.py b/addons/website_forum/models/forum.py
index d77270c55a9..f8cf3c6ea02 100644
--- a/addons/website_forum/models/forum.py
+++ b/addons/website_forum/models/forum.py
@@ -177,7 +177,7 @@ class Forum(models.Model):
     @api.model
     def create(self, values):
         res = super(Forum, self.with_context(mail_create_nolog=True, mail_create_nosubscribe=True)).create(values)
-        res._set_default_faq()
+        res._set_default_faq()  # will trigger a write and call update_website_count
         return res
 
     def write(self, vals):
@@ -199,8 +199,15 @@ class Forum(models.Model):
         if 'active' in vals:
             # archiving/unarchiving a forum does it on its posts, too
             self.env['forum.post'].with_context(active_test=False).search([('forum_id', 'in', self.ids)]).write({'active': vals['active']})
+
+        if 'active' in vals or 'website_id' in vals:
+            self._update_website_count()
         return res
 
+    def unlink(self):
+        self._update_website_count()
+        return super(Forum, self).unlink()
+
     @api.model
     def _tag_to_write_vals(self, tags=''):
         Tag = self.env['forum.tag']
@@ -238,6 +245,12 @@ class Forum(models.Model):
             'url': self._compute_website_url(),
         }
 
+    @api.model
+    def _update_website_count(self):
+        for website in self.env['website'].sudo().search([]):
+            website.forums_count = self.env['forum.forum'].sudo().search_count(website.website_domain())
+
+
 class Post(models.Model):
 
     _name = 'forum.post'
@@ -281,7 +294,7 @@ class Post(models.Model):
     is_correct = fields.Boolean('Correct', help='Correct answer or answer accepted')
     parent_id = fields.Many2one('forum.post', string='Question', ondelete='cascade', readonly=True, index=True)
     self_reply = fields.Boolean('Reply to own question', compute='_is_self_reply', store=True)
-    child_ids = fields.One2many('forum.post', 'parent_id', string='Post Answers')
+    child_ids = fields.One2many('forum.post', 'parent_id', string='Post Answers', domain=lambda self: [('forum_id', '=', self.forum_id.id)])
     child_count = fields.Integer('Answers', compute='_get_child_count', store=True)
     uid_has_answered = fields.Boolean('Has Answered', compute='_get_uid_has_answered')
     has_validated_answer = fields.Boolean('Is answered', compute='_get_has_validated_answer', store=True)
@@ -401,7 +414,7 @@ class Post(models.Model):
 
     def _get_uid_has_answered(self):
         for post in self:
-            post.uid_has_answered = any(answer.create_uid.id == post._uid for answer in post.child_ids)
+            post.uid_has_answered = post._uid in post.child_ids.create_uid.ids
 
     @api.depends('child_ids.is_correct')
     def _get_has_validated_answer(self):
@@ -838,7 +851,8 @@ class Post(models.Model):
         return result
 
     def set_viewed(self):
-        self._cr.execute("""UPDATE forum_post SET views = views+1 WHERE id IN %s""", (self._ids,))
+        self.ensure_one()
+        self._cr.execute("""UPDATE forum_post SET views = views+1 WHERE views = %s and id = %s""", (self.views, self.id,))
         return True
 
     def get_access_action(self, access_uid=None):
diff --git a/addons/website_forum/models/website.py b/addons/website_forum/models/website.py
index dcd937bf835..0957acb9cc7 100644
--- a/addons/website_forum/models/website.py
+++ b/addons/website_forum/models/website.py
@@ -1,19 +1,18 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import models, fields, _
+from odoo import models, fields, api, _
 from odoo.addons.http_routing.models.ir_http import url_for
 
 
 class Website(models.Model):
     _inherit = 'website'
 
-    def _compute_field_forums_count(self):
-        Forum = self.env['forum.forum']
-        for website in self:
-            website.forums_count = Forum.search_count(website.website_domain())
+    @api.model
+    def get_default_forum_count(self):
+        self.forums_count = self.env['forum.forum'].search_count(self.website_domain())
 
-    forums_count = fields.Integer(compute=_compute_field_forums_count)
+    forums_count = fields.Integer(readonly=True, default=get_default_forum_count)
 
     def get_suggested_controllers(self):
         suggested_controllers = super(Website, self).get_suggested_controllers()
diff --git a/addons/website_forum/views/website_forum.xml b/addons/website_forum/views/website_forum.xml
index e94790873ee..d3ee186195c 100644
--- a/addons/website_forum/views/website_forum.xml
+++ b/addons/website_forum/views/website_forum.xml
@@ -288,7 +288,7 @@
         </div>
         <div>
             <span class="mx-1 d-none d-sm-inline">&amp;nbsp;|</span>
-            <a t-if="len(question.child_ids)&gt;0" class="font-weight-bold" t-attf-href="/forum/#{ slug(question.forum_id) }/question/#{ slug(question) }">
+            <a t-if="question.child_count" class="font-weight-bold" t-attf-href="/forum/#{ slug(question.forum_id) }/question/#{ slug(question) }">
                 <t t-esc="question.child_count"/>
                 <t t-if="question.child_count == 1">Answer</t>
                 <t t-else="">Answers</t>
@@ -1181,10 +1181,10 @@
                     <t t-set="_collapse_uid" t-value="_question_comment_collapse_uid"/>
                 </t>
 
-                <section t-if="question.child_ids" t-attf-class="#{question.website_message_ids and 'mt-5' or 'mt-4'}">
+                <section t-if="question.child_count" t-attf-class="#{question.website_message_ids and 'mt-5' or 'mt-4'}">
                     <h5>
-                        <t t-esc="len(question.child_ids)"/>
-                        <t t-if="len(question.child_ids) == 1">Answer</t>
+                        <t t-esc="question.child_count"/>
+                        <t t-if="question.child_count == 1">Answer</t>
                         <t t-else="">Answers</t>
                     </h5>