diff --git a/.changeset/dirty-crabs-deliver.md b/.changeset/dirty-crabs-deliver.md
new file mode 100644
index 000000000000..374d10e37530
--- /dev/null
+++ b/.changeset/dirty-crabs-deliver.md
@@ -0,0 +1,5 @@
+---
+"@rocket.chat/meteor": patch
+---
+
+fix: Prevent app's bridges from overriding the lastMsg prop which further was affecting Omni-Visitor abandonment feature for app
diff --git a/apps/meteor/app/apps/server/converters/rooms.js b/apps/meteor/app/apps/server/converters/rooms.js
index 8fc74ac21c9a..44d513bd591d 100644
--- a/apps/meteor/app/apps/server/converters/rooms.js
+++ b/apps/meteor/app/apps/server/converters/rooms.js
@@ -38,11 +38,16 @@ export class AppRoomsConverter {
 		let v;
 		if (room.visitor) {
 			const visitor = await LivechatVisitors.findOneById(room.visitor.id);
+
+			const lastMessageTs = room?.visitor?.lastMessageTs;
+			const phone = room?.visitor?.channelPhone;
 			v = {
 				_id: visitor._id,
 				username: visitor.username,
 				token: visitor.token,
 				status: visitor.status || 'online',
+				...(lastMessageTs && { lastMessageTs }),
+				...(phone && { phone }),
 			};
 		}
 
@@ -172,9 +177,21 @@ export class AppRoomsConverter {
 					return undefined;
 				}
 
+				const { lastMessageTs, phone } = v;
+
 				delete room.v;
 
-				return this.orch.getConverters().get('visitors').convertById(v._id);
+				return {
+					...(await this.orch.getConverters().get('visitors').convertById(v._id)),
+					// Note: room.v is not just visitor, it also contains channel related visitor data
+					// so we need to pass this data to the converter
+					// So suppose you have a contact whom we're contacting using SMS via 2 phone no's,
+					// let's call X and Y. Then if the contact sends a message using X phone number,
+					// then room.v.phoneNo would be X and correspondingly we'll store the timestamp of
+					// the last message from this visitor from X phone no on room.v.lastMessageTs
+					...(phone && { channelPhone: phone }),
+					...(lastMessageTs && { lastMessageTs }),
+				};
 			},
 			department: async (room) => {
 				const { departmentId } = room;
diff --git a/apps/meteor/app/livechat/server/hooks/saveLastVisitorMessageTs.ts b/apps/meteor/app/livechat/server/hooks/saveLastVisitorMessageTs.ts
index b6273c0f3e74..1dabee3b8c03 100644
--- a/apps/meteor/app/livechat/server/hooks/saveLastVisitorMessageTs.ts
+++ b/apps/meteor/app/livechat/server/hooks/saveLastVisitorMessageTs.ts
@@ -9,6 +9,9 @@ callbacks.add(
 		if (!(isOmnichannelRoom(room) && room.v.token)) {
 			return message;
 		}
+		if (message.t) {
+			return message;
+		}
 		if (message.token) {
 			await LivechatRooms.setVisitorLastMessageTimestampByRoomId(room._id, message.ts);
 		}
diff --git a/packages/core-typings/src/IInquiry.ts b/packages/core-typings/src/IInquiry.ts
index 26ba2bc32188..f3dba1e9d907 100644
--- a/packages/core-typings/src/IInquiry.ts
+++ b/packages/core-typings/src/IInquiry.ts
@@ -18,6 +18,9 @@ export enum LivechatInquiryStatus {
 	OPEN = 'open',
 }
 
+// This is a subset of the IVisitor interface + channel related fields
+// IMPORTANT: If you're adding a new field here, make sure to update the
+// apps-engine's room converter to include it too
 export interface IVisitor {
 	_id: string;
 	username: string;