Sudden App Height issue - excessive blank space

Hi,
I´ve opened my embedded app created in February and

I´m suddenly having issues with its height (having excessive blank space on the form).

The app size was set to custom and 790 x 50, it is a kind of custom progress bar...see the pic

I needed to modify the app a bit (I added an IF function, I did not touch the size settings), the app is no longer the size I need.
The app settings still says 790 x 50 but the app on the form is now having a lot of blank space below.

The screens have the following function:
Max(App.Height, App.MinScreenHeight) and my question is where to set the MinScreenHeight? Will that help?

I tried to delete the Max function and put there 50 as static value but on the form I still can see the blank space...
I also tried to restore and publish the previous version, where it looks ok, but when I save and publish it, the size gets broken...

so it seems to me thare have been some changes in the way the size needs to be set up?

Any idea what happened and how to get my nice app back?
Thanks a lot