cinnamon: rendering artefacts near clock applet

[Vest1am]

I noticed that there is an artifact in the clock applet, it appears regardless of actions, I first saw it on the linux mint 21 version. This artifact regardless of the pc. Photo of artifacts attached.To make it disappear, just click on another applet or hover the mouse over the clock.

[vajdao]

Can't reproduce this, all good on my end.

[Vest1am]

The thing is that I also do not know what exactly this artifact comes from and what precedes it. I have a pc with version lm 20.3, where this problem is not observed, it appears with version lm 21.0.

[Initu-Castilhos]

This problem also happens on Ubuntu-Cinnamon

[s1tkeyz]

I have the same problem in all 21.x versions with Roboto font family.
It seems to happen randomly and disappears with mouse pointer hovered the clock applet.