Deleted Channels Reappearing

Teams DELETED Channels keep re-appearing.

This is an ALL COMPANY team. Several Channels were deleted 2 months ago. A few days ago, these hidden channels showed up on 1) my Win10 desktop Teams app, 2) on my iOS Teams App, and 3) in the new Edge browser Teams. They do not show up on my Android Teams App.
They showed up as a hidden channel. Sometimes, when trying to view them, they will disappear only to reappear about an hour later.
I am an owner on the team.