https://imgur.com/a/2nFL0

 

I fight an adra beetle with the redeemer and I get a proc of destroy vessel.

Does the description mean: " There is a 25% chance that the target gets destroyed if it is a vessel or it takes 30 raw damage if it is not a vessel"?

 

The english description says exactly the same.

If the ability does what I wrote above, that the description is very unclear.

Otherwise I consider it a bug that the ability "destroy vessel" works on something that is not a vessel.

As I recall, the description means "a vessel will be destroyed if it is your level or lower, or will take raw damage if it is higher than your level"

Exactly