Labels have artifacts

Labels have artifacts with transparent scene background. Is there any way to fix this behavior ?
https://www.screencast.com/t/iqzEJnTQUH

Cesium v1.61 / Windows 10 / Chrome (latest)

Are you able to share an example that reproduces this on Sandcastle (https://cesiumjs.org/Cesium/Apps/Sandcastle/index.html) or CodePen or something similar that I can run?

I’ve changed cesiumContainer background to white and the label get’s glitched, but if bg is black, it’s normal rendered.
I’m not shure, if that link is what you need, but I don’t quite understand how to save this pen into Sandcastle.
https://cesiumjs.org/Cesium/Apps/Sandcastle/standalone.html#c=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

Thanks for sharing the Sandcastle. I opened a bug report here:

https://github.com/AnalyticalGraphicsInc/cesium/issues/8155

It has definitely improved a lot in the last CesiumJS release, so hopefully we can get a chance to look into where the remaining artifacts are coming from.