Bare Byte decoding false positive

Hello, I'm tuning an ASM policy and I'm getting requests that are hitting this learning suggestion:

Action: Set Learn to disabled. Set Enabled to off.

Matched Evasion Technique: Bare byte decoding

I know requests are false positives (I can see from my log manager that are always the same ten requests to hit this alert), I want to create an exception in order not to block them, but I don't want to globally disable the "Bare Byte decoding" detection as suggested in "Action".

What options do I have?

Thank you!