This makes sense to me.
Other traceable decorators don't have such a high priority except the TraceableValidator. Here is the rationale: #22554 (comment) (tl;dr: it's for extra safety, but as said above the result is surprising).
/cc @ogizanagi I think the same fix should apply to the TraceableValidator.

Hmm, re-reading this, would make sense to make the traceable decorator last indeed… but since we don't have any unexpected report for this yet, perhaps keep this status-quo for the validator one. 🤷🏻‍♂️

Indeed, I think that decorating a validator isn't a common use case (I think almost nobody tried it).
That being said, the Validator decoration priority isn't valid IMHO, maybe it should be updated?

but since we don't have any unexpected report for this yet, perhaps keep this status-quo for the validator one. 🤷🏻‍♂️

I agree, let's keep it as-is as long as nobody actually complains (from my experience that kind of bugfixes in old versions is source of problems/anger -_-)

Thank you @mtarld.