Activities overview shows same preview for multiple windows on Wayland
Affected version
Arch Linux 5.5.13
Gnome Shell 3.36.0 (1:3.36.0+35+gd9a75412-1)
GeForce GTX 1070 with Nvidia proprietary driver 440.64-8
Bug appears on Wayland only, not on XOrg
Bug summary
Some (but not all) windows show the same preview in the activities overview, that of the last focused window.
Affected applications include Firefox, Steam, VLC Media Player, PCManFM and others.
Not affected are (random selection) Calculator, Extensions, Syncthing-GTK.
Steps to reproduce
Start a Wayland session, open some applications, open Activities.
What happened
All affected applications show the same preview, that of the last focused affected window.
What did you expect to happen
Individual previews showing the content of each window.