Hi, The corruption issue that you report just after upgrading to kernel 5.2 resembles very much to what I had on 2 filesystems after such an upgrade.
I think I'me gonna emergency downgrade all my BTRFS machines to kernel 5.1 before they break ,-( ॐ -- Swâmi Petaramesh <sw...@petaramesh.org> PGP 9076E32E