diff --git a/addons/mail/static/src/models/persona.js b/addons/mail/static/src/models/persona.js
index 291ee6bc15b..2715464437b 100644
--- a/addons/mail/static/src/models/persona.js
+++ b/addons/mail/static/src/models/persona.js
@@ -34,6 +34,19 @@ registerModel({
             }
             return clear();
         },
+        /**
+         * @private
+         * @returns {res.users.settings.volumes|FieldCommand}
+         */
+        _computeVolumeSetting() {
+            if (this.guest) {
+                return this.guest.volumeSetting || clear();
+            }
+            if (this.partner) {
+                return this.partner.volumeSetting || clear();
+            }
+            return clear();
+        },
     },
     fields: {
         channelMembers: many('ChannelMember', {
@@ -54,5 +67,8 @@ registerModel({
             identifying: true,
             inverse: 'persona',
         }),
+        volumeSetting: one('res.users.settings.volumes', {
+            compute: '_computeVolumeSetting',
+        }),
     },
 });
diff --git a/addons/mail/static/src/models/rtc_session.js b/addons/mail/static/src/models/rtc_session.js
index 22f036c5f81..3cf6ec72501 100644
--- a/addons/mail/static/src/models/rtc_session.js
+++ b/addons/mail/static/src/models/rtc_session.js
@@ -67,26 +67,23 @@ registerModel({
              * Manually updating the volume field as it will not update based on
              * the change of the volume property of the audioElement alone.
              */
-            this.update({ volume });
+            this.update({ localVolume: volume });
             if (this.audioElement) {
-                this.audioElement.volume = volume;
+                this.audioElement.volume = this.volume;
             }
             if (this.isOwnSession) {
                 return;
             }
-            if (this.channelMember.persona.partner && this.channelMember.persona.partner.volumeSetting) {
-                this.channelMember.persona.partner.volumeSetting.update({ volume });
-            }
-            if (this.channelMember.persona.guest && this.channelMember.persona.guest.volumeSetting) {
-                this.channelMember.persona.guest.volumeSetting.update({ volume });
-            }
             if (this.messaging.isCurrentUserGuest) {
                 return;
             }
+            if (this.channelMember.persona.volumeSetting) {
+                this.channelMember.persona.volumeSetting.update({ volume: this.volume });
+            }
             this.messaging.userSetting.saveVolumeSetting({
                 partnerId: this.channelMember.persona.partner && this.channelMember.persona.partner.id,
                 guestId: this.channelMember.persona.guest && this.channelMember.persona.guest.id,
-                volume,
+                volume: this.volume,
             });
         },
         /**
@@ -259,12 +256,11 @@ registerModel({
          * @returns {number} float
          */
         _computeVolume() {
-            if (this.channelMember) {
-                if (this.channelMember.persona.partner && this.channelMember.persona.partner.volumeSetting) {
-                    return this.channelMember.persona.partner.volumeSetting.volume;
-                } else if (this.channelMember.persona.guest && this.channelMember.persona.guest.volumeSetting) {
-                    return this.channelMember.persona.guest.volumeSetting.volume;
-                }
+            if (this.localVolume !== undefined) {
+                return this.localVolume;
+            }
+            if (this.channelMember && this.channelMember.persona.volumeSetting) {
+                return this.channelMember.persona.volumeSetting.volume;
             }
             if (this.audioElement) {
                 return this.audioElement.volume;
@@ -469,6 +465,7 @@ registerModel({
          * RTCIceCandidate.type String
          */
         localCandidateType: attr(),
+        localVolume: attr(),
         /**
          * Token to identify the session, it is currently just the toString
          * id of the record.
diff --git a/addons/mail/static/src/models/user_setting.js b/addons/mail/static/src/models/user_setting.js
index ccee9a45fae..704069f59a4 100644
--- a/addons/mail/static/src/models/user_setting.js
+++ b/addons/mail/static/src/models/user_setting.js
@@ -89,10 +89,10 @@ registerModel({
             await this.messaging.rtc.updateLocalAudioTrack(true);
         },
         /**
-         * @param {String} value
+         * @param {string} value
          */
         setDelayValue(value) {
-            this.update({ voiceActiveDuration: parseInt(value, 10) });
+            this.update({ localVoiceActiveDuration: parseInt(value, 10) });
             if (this.messaging.currentUser) {
                 this._saveSettings();
             }
@@ -102,7 +102,7 @@ registerModel({
          */
         async setPushToTalkKey(ev) {
             const pushToTalkKey = `${ev.shiftKey || ''}.${ev.ctrlKey || ev.metaKey || ''}.${ev.altKey || ''}.${ev.key}`;
-            this.update({ pushToTalkKey });
+            this.update({ localPushToTalkKey: pushToTalkKey });
             if (this.messaging.currentUser) {
                 this._saveSettings();
             }
@@ -136,7 +136,7 @@ registerModel({
             await this.messaging.rtc.updateVoiceActivation();
         },
         async togglePushToTalk() {
-            this.update({ usePushToTalk: !this.usePushToTalk });
+            this.update({ localUsePushToTalk: !this.usePushToTalk });
             await this.messaging.rtc.updateVoiceActivation();
             if (this.messaging.currentUser) {
                 this._saveSettings();
@@ -150,9 +150,12 @@ registerModel({
         },
         /**
          * @private
-         * @returns {boolean|FieldCommand}
+         * @returns {string|FieldCommand}
          */
         _computePushToTalkKey() {
+            if (this.localPushToTalkKey !== undefined) {
+                return this.localPushToTalkKey;
+            }
             if (!this.messaging.currentUser) {
                 return clear();
             }
@@ -166,6 +169,9 @@ registerModel({
          * @returns {boolean|FieldCommand}
          */
         _computeUsePushToTalk() {
+            if (this.localUsePushToTalk !== undefined) {
+                return this.localUsePushToTalk;
+            }
             if (!this.messaging.currentUser) {
                 return clear();
             }
@@ -179,6 +185,9 @@ registerModel({
          * @returns {boolean|FieldCommand}
          */
         _computeVoiceActiveDuration() {
+            if (this.localVoiceActiveDuration !== undefined) {
+                return this.localVoiceActiveDuration;
+            }
             if (!this.messaging.currentUser) {
                 return clear();
             }
@@ -289,6 +298,9 @@ registerModel({
         isRegisteringKey: attr({
             default: false,
         }),
+        localPushToTalkKey: attr(),
+        localUsePushToTalk: attr(),
+        localVoiceActiveDuration: attr(),
         /**
          * String that encodes the push-to-talk key with its modifiers.
          */