Just an update on this. There’s been an update to the issue on the 10th of January with “Under Investigation. This issue is currently being investigated…”, which is a nice change from “more info needed”, or even worse “this isn’t a bug it’s a feature”, so they’ve managed to reproduce the bug and are looking into it.

This means if you see the 17.8.4 update available message, the fix isn’t in there, so don’t update yet. I’m using 17.8.0 - I’m not sure if the bug was introduced in 17.8.1, 17.8.2, or 17.8.3, but 17.8.0 is definitely safe to use.