I'm interested to know how it goes for you with this update (either from the included debdiff, or from the packages when they hit -proposed.) We were seeing the exact same symptoms you were, and deep-dove into your backported fix from the GNOME bug and it all seems like it should fix the issue. We've tested extensively with your fix and the symptoms completely disappeared, even from the machines most frequently affected.
Sjors:
I'm interested to know how it goes for you with this update (either from the included debdiff, or from the packages when they hit -proposed.) We were seeing the exact same symptoms you were, and deep-dove into your backported fix from the GNOME bug and it all seems like it should fix the issue. We've tested extensively with your fix and the symptoms completely disappeared, even from the machines most frequently affected.