Pulsating skill levels on the UI

I don't think I've seen this before today, and now I've seen it happen at least twice. Some of the gems' levels on the skill UI will start pulsating when looking at the skills tab. It can also cause some performance issues while navigating the UI, it happened a third time and there was some slowdown.

This can persist through opening and closing the menus, and it stops doing it just as mysteriously as it begins. I've been trying different Spectres today and going in and out of that UI a lot, so I'm not sure if that's related to this happening. I was not able to find a way to spontaneously make this glitch occur.

When I caught it doing it on the most recent occurence it was happening to Essence Drain, Bind Spectre, and Spectre: x gems. (Flame Wall, Despair, Contagion, Withering Presence, Discipline, Decompose, and Raise Shield gems were unaffected.)

Recording of the glitch: https://youtu.be/d0mwtOCMe-w