I just noticed that on my 3.10 instance, that the order of the Available language packs has lost its sort order. Please see attached screenshot.
The default language is the default 'en'. I have purged the caches, but it remains in this odd order. The scheduled task to update all installed language packs is running daily, though I assume that only updates the installed ones and not the available ones.
Could this be related to the current work on AMOS and the updating of the various source packs?