Clientbrowser not updated after changing form design

オフライン

After making changes to a form (e.g. adding a new field to the Part form) some of the clients do not see the changes.

I already tried deleting browser cache, changing browser, restarting/recycling application pools etc.

Still some of the clients (Chrome or Edge) do get the updated fields, others not.  

They all have the same rights

Is there a option/way to push a change to the browser, is it user dependent, ... ?

Is there a way to find out where it goes wrong?

Aras Version : 11SP12

Thanks for any tip