diff --git a/packages/controller/src/Controller.ts b/packages/controller/src/Controller.ts
index 89214e0f..4ad9e6f0 100644
--- a/packages/controller/src/Controller.ts
+++ b/packages/controller/src/Controller.ts
@@ -937,6 +937,7 @@ export default class Controller {
 			);
 		} else {
 			instance.status = "unassigned";
+			instance.updatedAt = Date.now();
 			this.instanceDetailsUpdated([instance]);
 		}
 	}
diff --git a/packages/controller/src/HostConnection.ts b/packages/controller/src/HostConnection.ts
index f4cf1d84..ec078553 100644
--- a/packages/controller/src/HostConnection.ts
+++ b/packages/controller/src/HostConnection.ts
@@ -57,6 +57,7 @@ export default class HostConnection extends BaseConnection {
 		}
 
 		this.connector.on("close", () => {
+			const now = Date.now();
 			// Update status to unknown for instances on this host.
 			const instances: InstanceInfo[] = [];
 			for (let instance of this._controller.instances.values()) {
@@ -67,6 +68,7 @@ export default class HostConnection extends BaseConnection {
 				instances.push(instance);
 				let prev = instance.status;
 				instance.status = "unknown";
+				instance.updatedAt = now;
 				lib.invokeHook(this._controller.plugins, "onInstanceStatusChanged", instance, prev);
 			}
 			this._controller.instanceDetailsUpdated(instances);