Weird two-phased evasion

Skill/Item name (if relevant):

Class/Level (if relevant):

Party or solo:

Describe the problem: Monster are not evading properly. Sometimes, when the first (incorrect evading is happening, you might not leave the combat stance, which ends up you are stuck in combat for a very long time.

What was the expected behavior?:

List the steps that occurred before the problem appeared:
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Can you reproduce the problem?: Yes.

Screenshots/Videos (if available):