What kind of feature are you missing? Where do you notice a shortcoming of PTB?

\Python312\Lib\site-packages\telegram\ext_application.py", line 1259, in process_update
for handlers in self.handlers.values():
^^^^^^^^^^^^^^^^^^^^^^
RuntimeError: dictionary changed size during iteration

I want the buttons in that menu to be active when navigating between menus in Telegram, but sometimes ı encounter this problem when I try to add or delete handlers for the buttons.

Describe the solution you'd like

We need to be able to add or remove handlers while the code is running, this is a big deficiency.

Describe alternatives you've considered

No response

Additional context

No response