Not yet, but I spent last week cleaning up my descriptions to avoid any problems so I feel I should be safe. Maybe, you know Amazon.
One shirt I had to fix the description for hadn't sold in ages but made a sale on Monday. I heard from other people it doesn't hurt to change up your descriptions now and then because it might give your shirt a boost in the rankings when Amazon makes the changes. I didn't change much, just removed an old reference to ordering a size up. This shirt was never a good seller so if some more get ordered I might be updating a lot of descriptions.
Good luck with your merch sales.