I found some iffy interactions.
When you load a workshop map - sometimes - the mission description gets corrupted/deleted.
I cannot reliably reproduce it, but I think it has something to do with how the game handles local maps vs. workshop maps. And I think it should not be handled that way in the first place. If you upload a map from local to workshop, it should just get a tag that it has a workshop ID, and it can be edited and used interchangeably.
No distinction between Workshop and Local maps. Just Maps, and you can always decide to upload it or update it.