[Milhouse]

I use LE since version 7 on the same HW & never noticed this effect

Is #0904 the first test build you've used? If you were using an earlier test build which didn't have this problem, then going back through the builds to work out when it started would be helpful.

A debug log would also be useful, if for no other reason to understand what hardware it is you are using (for instance, is your GPU an Intel, AMD or Nvidia?)

Also, are you testing with the stock Estuary skin? If not, see if you can reproduce the issue with stock Estuary please.

I ve a video but I don't know where to upload it

Yes, this will be interesting to see. Either Dropbox or Google Drive should be fine.