To elaborate: it was already in progress, but delayed due to 1. the fact that I underestimated the impact (I thought we'd overwrite the file only when we'd modify it, not every update the package) and 2. lots of other priorities keeping the team busy.
But it's clearly the reminder, and the help in better diagnosing it, that allowed to have it re-prioritized and (partly, we've mostly bought time to fix it properly, by simply avoiding to touch the file at all at the moment) fixed so fast.