@richhie thanks for posting! This behavior is intentional with the current setup of the History tab. From that tab, you can select either a single Object to delete the Object:

Or you can select multiple and then Move to Bin.
However, at this moment you cannot delete built-in objects. See also this Feature Request:
Delete or Hide Predefined Types And Relations - Feature Requests - Anytype Community

Therefore, even if you select multiple Ojects, the ones that are default/built-in won’t be deleted when you move them to the Bin.
Your request indicates you would like to be able to completely clear the History tab. As there already is a feature request to be able to override/hide built-in Object Types, I suggest we close this bug report in favor of that feature request. Do you agree?

