[BUG] Nested timeline, Text+ with a shadow (Shading)

When I put a timeline that has a Text+ with a shadow (3rd element in the Shading tab of the Text+)
There are artifacts around the text.

I didn't test with other elements other than a simple shadow, I just got this problem now on a project.

The "nested timeline" thing is a mess. Same thing goes with audio effects (like auto-ducking, or any audio effects on a track).

Windows 10 pro
RTX 3080 with the "good" drivers 460.something

I'm seeing the same in Studio 17b8 for Windows. It's a mess.

I wonder if it's related to the alpha issue with Cropping.

I just did a quick test with the beta 9 the same way I did before, it seems to work this time (I didn't do more than put a text+ with a shadow on a timeline, and put the timeline in another one so I don't know how it will behave later on a edit).