The Clear Clipboard feature seems to work as intended for me, and I cannot seem to replicate this issue in any Bitwarden app/client on Windows, MacOS, Linux, or Android. Can someone provide specific clients, OS, steps, etc. to replicate the issue?
Noe that if you have installed an app that records your clip history, Bitwarden does not claim to clear that, nor could it. Swiftkey on Android is a good example of this - you must disable the Remember Copied Items feature to prevent it from storing items.