Flickering label tileset since 1.121

[lukemckinstry]

What happened?

Since updating to 1.121 (user skipped directly to 1.122 but could not reproduce this with 1.120 or prior) user has a label tileset that keeps flickering.
Reported on forums here https://community.cesium.com/t/flickering-label-tileset-since-1-121-0/36316
User has not changed data since issue started occurring.

Here’s a sandcastle with the tileset in action, try zooming or moving around Switzerland and you should see black flickering all over the place.

I am able to reproduce the issue on prod sandcastle.

Reproduction steps

...

Sandcastle example

No response

Environment

Browser:
CesiumJS Version:
Operating System:

[ggetz]

Thanks for opening this report @lukemckinstry!

I think this may be a manifestation of #12231. I'm going to close your issue to keep the discussion in one place. If you have any further input on this, please post it there instead.