Notificiation appears when comeback to the browser

HI
I have timer to get data from server in evrey second
if the request is fail i generate error notif and when one of the request is ok i use . "clearAll()" . functon to remove the error message.

the problem is when the notification was in the background and im not on the page , and the connection lost and and comeback and I m still on othe page when I come back to the page I got the error message for second and then clear all again . .. event the connection is good for a while.

how can I make sure that will not happen

in error I call to . Notification.error and change the flag to true
and in success i use clearAll . and change the flag .