When enabling a plug-in, it doesn’t show up until reloading a vault (might be working as intended)
However, after disabling a core plug in, it remains visible while the functionality is removed.
For example, I disabled the tag pane. The "tag pane button is still visible, but the functionality of the button was removed and the items all shifted up. This resulted in the tag pane button bringing up the starred files tab while the starred files button ceased to function. See image below: