Form filter - no input allowed

I was having form opened and filtered. When I work for some time and then try to change the filter whate happens is

As you can notice the field “Účet” have no input part to type in. It is of type uniqueidentifier, so list of values vould be expected. When closing the firlter and opening again, it usually works again. Not always.

We are revisiting this issue.

Is there a reliable way to reproduce the problem?