Maximize/unmaximize windows animation breaks in Epiphany when a website is loaded

[dmatavel]

first, congratulations to everyone for the release of elementary OS 6, a great advance and an amazing job.

i am opening this issue because i didn't find it among the ones already open, if i am wrong, please notify me.

what happened?

when maximizing or unmaximize the Epiphany window with a loaded site, it crashes, displaying a non-standard behavior. The window splits in two pieces.

this does not happen when a site is not loaded, and as far as I was able to test, it doesn't happen with the other standard system apps.

Peek.10-08-2021.17-45.mp4

how to reproduce?

1. open Epiphany
2. load a site
3. maximize/unmaximize the Epiphany window

System and Hardware info

[janxkoci]

But does it stay like that, in two pieces? I can see it happening during the transition (for years actually), but it's always a matter of a second or two, before the window snaps into the right position. It never stayes like that for me.

Edit: just seen the gif screencast, so it's only during the transition, right?

[dmatavel]

Yeah, it's only during the transitions. Thanks for the observation.

[janxkoci]

I suspect this will be more related to the web content rendering, meaning the WebkitGTK engine, not Epiphany itself. I would be surprised if it wasn't reported on Webkit bugzilla already, but I will check later, now I'm a bit busy.

[dmatavel]

It's possible. I'm new whit those technical terms and details. Wish I could help in other directions. Tell me if you find anything.