Begin with a forced-restart of your iPad - as this will often clear an isolated software issue:
Force restart iPad - Apple Support
If you have discovered a consistent and repeatable bug, that is not cleared by the restart, you should submit a Bug Report to Apple via its Product Feedback portal. For iPad and iPadOS:
Feedback - iPad - Apple
Every report counts - as until Apple receive a sufficient number or reports, it is perhaps unlikely that resources will be assigned to investigate and resolve the issue.
When submitting a report, ensure that you include as much detail as possible within the body of the report - including your iPad model and installed version of iPadOS; don’t rely upon the pick-list, as this rarely includes the full range of device models or most recent versions of iOS/iPadOS.