Hey all, there is a mod on Nexus to fix the repeating dialogue for Minthara. Judging by Larian's track record with her, I'm not expecting them to fix the bug this week (or anytime soon) so I'm using this now to resume my playthrough. Here is the link if anyone wants to use it too.

[Linked Image from i.ibb.co]

Minthara bug list, updated for Hotfix #22.