As far as I am aware, there have not been made any changes to our versioning on SharePoint Online. Yet out of a sudden, changes in files or uploads of equally named files with differing content do not lead to new minor versions anymore. Besides numerous tests, the only remediation I tried was to set versioning off and on again. However, that did not help. Is there any setting I am not aware of? Could you guys please help us out? Thank you very much in advance for any help!
Whether both major and minor versions do not work?
Try to create a new document library, enable versioning, compare the result.