diff --git a/addons/mail/static/src/core/common/partner_compare.js b/addons/mail/static/src/core/common/partner_compare.js
index f494740a464..920aba90d3d 100644
--- a/addons/mail/static/src/core/common/partner_compare.js
+++ b/addons/mail/static/src/core/common/partner_compare.js
@@ -7,7 +7,7 @@ import { registry } from "@web/core/registry";
  * Registry of functions to sort partner suggestions.
  * The expected value is a function with the following
  * signature:
- *     (partner1: Partner, partner2: Partner, { env: OdooEnv, searchTerm: string, thread?: Thread }) => number|undefined
+ *     (partner1: Partner, partner2: Partner, { env: OdooEnv, searchTerm: string, thread?: Thread , context?: Object}) => number|undefined
  */
 export const partnerCompareRegistry = registry.category("mail.partner_compare");
 
diff --git a/addons/mail/static/src/core/common/persona_service.js b/addons/mail/static/src/core/common/persona_service.js
index 8acb9998e15..58b0abdb955 100644
--- a/addons/mail/static/src/core/common/persona_service.js
+++ b/addons/mail/static/src/core/common/persona_service.js
@@ -84,16 +84,17 @@ export class PersonaService {
         return Object.values(this.store.Thread.records)
             .filter((thread) => thread.type === "chat")
             .sort((a, b) => {
-                if (!a.lastInterestDateTime && !b.lastInterestDateTime) {
+                const [a_dt , b_dt] = [a.lastInterestDateTime, b.lastInterestDateTime]
+                if (!a_dt && !b_dt) {
                     return 0;
                 }
-                if (a.lastInterestDateTime && !b.lastInterestDateTime) {
+                if (a_dt && !b_dt) {
                     return -1;
                 }
-                if (!a.lastInterestDateTime && b.lastInterestDateTime) {
+                if (!a_dt && b_dt) {
                     return 1;
                 }
-                return b.lastInterestDateTime.ts - a.lastInterestDateTime.ts;
+                return b_dt.ts - a_dt.ts;
             })
             .map((thread) => thread.chatPartner?.id);
     }
diff --git a/addons/mail/static/src/core/common/suggestion_service.js b/addons/mail/static/src/core/common/suggestion_service.js
index 4f69e8e603c..0777a64e83a 100644
--- a/addons/mail/static/src/core/common/suggestion_service.js
+++ b/addons/mail/static/src/core/common/suggestion_service.js
@@ -14,6 +14,7 @@ export class SuggestionService {
         this.env = env;
         this.orm = services.orm;
         this.store = services["mail.store"];
+        this.personaService = services['mail.persona'];
     }
 
     getSupportedDelimiters(thread) {
@@ -155,12 +156,14 @@ export class SuggestionService {
     sortPartnerSuggestions(partners, searchTerm = "", thread = undefined) {
         const cleanedSearchTerm = cleanTerm(searchTerm);
         const compareFunctions = partnerCompareRegistry.getAll();
+        const context = { recentChatPartnerIds: this.personaService.getRecentChatPartnerIds() };
         return partners.sort((p1, p2) => {
             for (const fn of compareFunctions) {
                 const result = fn(p1, p2, {
                     env: this.env,
                     searchTerms: cleanedSearchTerm,
                     thread,
+                    context,
                 });
                 if (result !== undefined) {
                     return result;
@@ -238,7 +241,7 @@ export class SuggestionService {
 }
 
 export const suggestionService = {
-    dependencies: ["orm", "mail.store"],
+    dependencies: ["orm", "mail.store", "mail.persona"],
     /**
      * @param {import("@web/env").OdooEnv} env
      * @param {Partial<import("services").Services>} services
diff --git a/addons/mail/static/src/discuss/core/common/partner_compare.js b/addons/mail/static/src/discuss/core/common/partner_compare.js
index 260a66f2512..f757bf1767b 100644
--- a/addons/mail/static/src/discuss/core/common/partner_compare.js
+++ b/addons/mail/static/src/discuss/core/common/partner_compare.js
@@ -4,8 +4,8 @@ import { partnerCompareRegistry } from "@mail/core/common/partner_compare";
 
 partnerCompareRegistry.add(
     "discuss.recent-chats",
-    (p1, p2, { env }) => {
-        const recentChatPartnerIds = env.services["mail.persona"].getRecentChatPartnerIds();
+    (p1, p2, { env, context }) => {
+        const recentChatPartnerIds = context.recentChatPartnerIds || env.services["mail.persona"].getRecentChatPartnerIds();
         const recentChatIndex_p1 = recentChatPartnerIds.findIndex(
             (partnerId) => partnerId === p1.id
         );