Following the now-established pattern from previous releases, I’ve had to do a service release to fix something! It seems that the “deleted replies back from the dead” problem wasn’t just restricted to the special case when mention-checking is first enabled. This is the sort of thing that only gets found when others use the software. Big thanks to everyone who has reported this and apologies for having to update again so soon!
Incidentally, sometimes when installing an update your device will report that you are attempting to replace the current version with the same version. This is caused by erroneous reporting of a cached version number and can be safely ignored – you will definitely be installing the latest version.