Owner is muted in a Team that is owner only posts.

DanWilts  I am sure by now you have figured out the solution to this, but this reply is mainly for all the other people who asked in this post and were not answered.

It is a bizarre process that solves this problem. The problem sometimes comes up when teams are being created. Those people who are muted members, when turned into owners, end up remaining muted owners. However, I have seen this glitch occur even when teachers are in a team where students are muted at some point....
Solution:
1. Turn your muted owner into a member. (I realise that for classroom teams, this creates a section in the Class Notebook, but it is unavoidable, you will just have to delete the extra section manually)
2. Mute the former owner, unmute them.

3. Restore them back to owner status and all should be well.

Hope it helps

Nice day.