Package: gimp Version: 2.10.22-4 Reproduce: 0. Create a new image 1. Set the image mode to indexed, 1-bit, black and white (Image→Mode→Indexed...→Use black and white (1-bit) palette) 2. Export image in the Windows BMP image format 3. Open the exported file
Previously, in the GIMP 2.10.8-2 available in Debian Buster, the issue of not being able to open BMP files created by itself was non-existent. It is also worth noting that the BMP created by both versions can be opened by 2.10.8-2, but not by 2.10.22-4, so it's not an issue with the exporting method changing.
