Pixelmator Pro Debanding and Electronic Shutter
Pixelmator Pro Deband feature does not work on banding caused by the well known electronic shutter lag.
The Deband feature has not been advertised as working also with ES-induced banding, so the fact that it can not handle it is not a bug. However, this limit seriously reduces the appeal of the new feature.
I have flagged the issue to Pixelmator Pro Support: currently, they are out of work, but eventually, they should get back to me with some news. Good news, hopefully.