Weird dots on the cast bar

What this problem is related to? (e.g. Broken model or texture / Incorrectly placed model / Particle Effect / Animation / Collision problem / etc. ):

Location/Coordinates (/pos, if relevant):

Describe the problem: Doesn’t look like it belongs there.

List the steps that occurred before the problem appeared (if relevant):
1.
2.
3.

Can you reproduce the problem? (if relevant):
image

Screenshots/Videos (if available):

Another case
image

Happened to me first time today. I was in Cave of Ymir Lv1 farming crystals.