Vaadin UI freezes and it shows top progress Bar for indefinite time

Flow
1

I want to view additional three fields if I select RoleType(Comobox) as user
I am using ui.push in ui.access to update some fields in my formlayout.
This works if the app is not idle for longer duration.
But if it is kept idle for sometime
(5-10 minutes) and then if I click on “ADD” icon of the GridCrud then
Vaadin UI freezes and it shows top progress Bar for indefinite time.
and the only fix is to reload the page.
2)
I have an option to upload a document.If I keep the page idle for some time and then I try to upload a file then file gets uploaded and it shows name of file uploaded along with a top progress bar.The progress bar after reaching a certain endpoint disappears and In the file upload where I show name of file uploaded.It shows “Connecting…” for indefinite time.

How to fix these.Please help someone.

vaadin version 23.3.33

2

23.3.3 is an outdated version. As a first step, I would update to the latest (23.3.35) and check if the issue persists.

3

It was a mistake I updated it.
Vaadin version is 23.3.33