Infinite Abyss bug 3.26

I captured the video after I was standing next to the abyss encounter for 10 minutes.
Leaving the area does not solve the issue, the abyss encounter cannot progress further.
I dont know how to replicate or how hard it is to replicate this bug.
Luckily, it cannot be abused because the mobs do not give any loot, and they grant horrible exp.
https://youtu.be/vojKPo2ohC8

I have had the same problems several times