Sage's weapon switch bug

Bug Name:

Sage's weapon switch bug​

Bug Description:

The bug is as described in my title.
After being hit by an enemy in battle, the sage inexplicably switches from the awakened weapon state to the main hand weapon mode.
According to my observation, the greatest probability of occurrence is the moment when the opponent stands up after being knocked down or killed.
The other is that when you put away the weapon and want to use the LMB to take out the weapon, it will fail for a long time.
I don’t know if I describe the conditions of the bug correctly, please investigate. Thank you for your work.​

How to reproduce/proof:

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Although not sage.
But lahn‧guardian also has the same situation.
After being attacked by a compulsory CC, it will switch to the main weapon.
(0:35)

(02:10)