Abyss keep spawning mobs, not closing after destroying the Spyre

Hello,
bug happens quite often, almost one abyss node don't close each maps even after defeating the spyre. I don't know if it's related to scarabs but I'll give some context :

Maps t16.5
Scarabs : 3x risk + 1x edifice + 1x abyss
build : hiero vortex of proj

Please fix it's annoying, it doesn't disappear from minimap also.

Abyss not ending is as old as Abyss league (or around that time, I'm old). Whatever the cause of the bug is, it isn't related to scarabs, atlas tree, or specific maps. Collision/terrain, specific combination of monsters spawning, or a couple of other reasons are all possible causes. But I'm not hopeful of a fix any time soon from the hundreds of times it has been reported already.

Only fix I found is to take a deep breath when it happens and go to the next one. :/