Test WA: https://wago.io/2vV58rI7D
This WA should only trigger if the target has a buff with debuffType "magic".

When having no target and then switching to a target with no magic buff everything is fine, but when you switch from one target having a magic buff to another target without a magic buff it remains active (triggered) using the first (random?) buff it can find.
This way it triggers on things like mounts, resounding protection, challengers burden etc.

Assumption is that on changing targets if no (proper) debuffType is returned from any buff on the new target it somehow keeps the debuffType information from the last target.

i can confirm the bug, by targeting myself with a few magic buffs, then target random players around me in capital, the icon can show a wrong buff, but it's not always, i have not managed to understand how to 100% reproduce it

This is fixed for the next release, thanks for the report.