diff --git a/addons/website_slides/controllers/main.py b/addons/website_slides/controllers/main.py
index a8413154fa0..3675da795c0 100644
--- a/addons/website_slides/controllers/main.py
+++ b/addons/website_slides/controllers/main.py
@@ -562,10 +562,6 @@ class WebsiteSlides(WebsiteProfile):
         if category_id and not category:
             category = channel.slide_category_ids.filtered(lambda category: category.id == category_id)
 
-        # retro-compatibility for older links, 'slide_category' field was previously named 'slide_type'
-        # can be safely removed after 15.3 (I swear though, don't be afraid, remove it!)
-        slide_category = slide_category or kw.get('slide_type')
-
         domain = self._get_channel_slides_base_domain(channel)
         pager_url = "/slides/%s" % (channel.id)
         pager_args = valid_invite_values.get('pager_args', {})
diff --git a/addons/website_slides/views/website_slides_templates_course.xml b/addons/website_slides/views/website_slides_templates_course.xml
index 7b8e09bbcb8..0ae1f634a06 100644
--- a/addons/website_slides/views/website_slides_templates_course.xml
+++ b/addons/website_slides/views/website_slides_templates_course.xml
@@ -17,19 +17,19 @@
                             <a t-if="invite_preview" t-attf-href="/slides/#{channel.id}?#{keep_query('invite_hash', 'invite_partner_id')}" class="text-truncate d-block"><span t-esc="channel.name"/></a>
                             <a t-else="" t-att-href="'/slides/%s' % slug(channel)" class="text-truncate d-block"><span t-esc="channel.name"/></a>
                         </li>
-                        <li t-att-class="breadcrumb_class" t-att-aria-current="'page' and search_category" t-if="search_category">
-                            <a t-if="invite_preview" t-attf-href="/slides/#{channel.id}/category/#{search_category.id}?#{keep_query('invite_hash', 'invite_partner_id')}"><span t-esc="search_category.name"/></a>
-                            <a t-else="" t-attf-href="/slides/#{slug(channel)}/category/#{slug(search_category)}"><span t-esc="search_category.name"/></a>
+                        <li t-att-class="breadcrumb_class" t-if="search_category">
+                            <a t-if="invite_preview" t-attf-href="/slides/#{channel.id}/category/#{search_category.id}?#{keep_query('invite_hash', 'invite_partner_id')}" aria-current='page'><span t-esc="search_category.name"/></a>
+                            <a t-else="" t-attf-href="/slides/#{slug(channel)}/category/#{slug(search_category)}" aria-current='page'><span t-esc="search_category.name"/></a>
                         </li>
-                        <li t-att-class="breadcrumb_class" t-att-aria-current="'page' and search_tag" t-if="search_tag">
-                            <a t-att-href="'/slides/%s/tag/%s' % (slug(channel), slug(search_tag))"><span t-esc="search_tag.name"/></a>
+                        <li t-att-class="breadcrumb_class" t-if="search_tag">
+                            <a t-att-href="'/slides/%s/tag/%s' % (slug(channel), slug(search_tag))" aria-current='page'><span t-esc="search_tag.name"/></a>
                         </li>
-                        <li t-att-class="breadcrumb_class" t-att-aria-current="'page' and search_uncategorized" t-if="search_uncategorized">
-                            <a t-if="invite_preview" t-attf-href="/slides/#{channel.id}?uncategorized=1&amp;#{keep_query('invite_hash', 'invite_partner_id')}">Uncategorized</a>
-                            <a t-else="" t-attf-href="/slides/#{slug(channel)}?uncategorized=1">Uncategorized</a>
+                        <li t-att-class="breadcrumb_class" t-if="search_uncategorized">
+                            <a t-if="invite_preview" t-attf-href="/slides/#{channel.id}?uncategorized=1&amp;#{keep_query('invite_hash', 'invite_partner_id')}"  aria-current='page'>Uncategorized</a>
+                            <a t-else="" t-attf-href="/slides/#{slug(channel)}?uncategorized=1" aria-current='page'>Uncategorized</a>
                         </li>
-                        <li t-att-class="breadcrumb_class" t-att-aria-current="'page' and search_slide_category" t-if="search_slide_category">
-                            <a t-att-href="'/slides/%s?slide_category=%s' % (slug(channel), search_slide_category)"><span t-esc="slide_categories[search_slide_category]"/></a>
+                        <li t-att-class="breadcrumb_class" t-if="search_slide_category">
+                            <a t-att-href="'/slides/%s?slide_category=%s' % (slug(channel), search_slide_category)" aria-current='page'><span t-esc="slide_categories.get('search_slide_category', '-')"/></a>
                         </li>
                         <li t-if="slide" class="breadcrumb-item fw-bold">
                             <a t-att-href="'/slides/slide/%s' % slug(slide)"><span t-esc="slide.name"/></a>
@@ -65,19 +65,19 @@
                                     t-attf-href="/slides/#{channel.id if invite_preview else slug(channel)}?#{keep_query('invite_hash', 'invite_partner_id') if invite_preview else ''}">
                                     &#9492;<span class="ms-1" t-esc="channel.name"/>
                                 </a>
-                                <a t-att-class="dropdown_class" t-att-aria-current="'page' and search_category" t-if="search_category"
+                                <a t-att-class="dropdown_class" aria-current="page" t-if="search_category"
                                     t-attf-href="/slides/#{channel.id if invite_preview else slug(channel)}/category/#{search_category.id if invite_preview else slug(search_category)}?#{keep_query('invite_hash', 'invite_partner_id') if invite_preview else ''}">
                                     &#9492;<span class="ms-1" t-esc="search_category.name"/>
                                 </a>
-                                <a t-att-class="dropdown_class" t-att-aria-current="'page' and search_tag" t-if="search_tag" t-att-href="'/slides/%s/tag/%s' % (slug(channel), slug(search_tag))">
+                                <a t-att-class="dropdown_class" aria-current="page" t-if="search_tag" t-att-href="'/slides/%s/tag/%s' % (slug(channel), slug(search_tag))">
                                     &#9492;<span class="ms-1" t-esc="search_tag.name"/>
                                 </a>
-                                <a t-att-class="dropdown_class" t-att-aria-current="'page' and search_uncategorized" t-if="search_uncategorized"
+                                <a t-att-class="dropdown_class" aria-current="page" t-if="search_uncategorized"
                                     t-attf-href="/slides/#{channel.id if invite_preview else slug(channel)}?uncategorized=1&amp;#{keep_query('invite_hash', 'invite_partner_id') if invite_preview else ''}">
                                     &#9492;<span class="ms-1">Uncategorized</span>
                                 </a>
-                                <a t-att-class="dropdown_class" t-att-aria-current="'page' and search_slide_category" t-if="search_slide_category" t-att-href="'/slides/%s?slide_category=%s' % (slug(channel), search_slide_category)">
-                                    &#9492;<span class="ms-1" t-esc="slide_categories[search_slide_category]"/>
+                                <a t-att-class="dropdown_class" aria-current="page" t-if="search_slide_category" t-att-href="'/slides/%s?slide_category=%s' % (slug(channel), search_slide_category)">
+                                    &#9492;<span class="ms-1" t-esc="slide_categories.get('search_slide_category', '-')"/>
                                 </a>
                                  <a t-if="slide" class="dropdown-item active" t-att-href="'/slides/slide/%s' % (slug(slide))">
                                     &#9492;<span class="ms-1" t-esc="slide.name"/>