Comment by nonrandomstring

Yes, just more generally document it

I've lost count of how many things i've fixed only to to see;

1) It recurs because a deeper "cause" of the bug reactivated it.

2) Nobody knew I fixed something so everyone continued to operate workarounds as if the bug was still there.

I realise these are related and arguably already fall under "You didn't fix it". That said a bit of writing-up and root-cause analysis after getting to "It's fixed!" seems helpful to others.