"Run"-Button beneath code cell does not show context menu anymore

I have a python file (no jupyter notebook file) with various #%% annotations to split the code into cells and execute it cell-wise during development. As usual, pyCharm shows the small green "run" button left beside the annotation, right next to the line number, allowing me to execute the corresponding cell. Until yesterday, a click on this button resulted in the usual dropdown menu showing various run, debug, profile, edit run configurations etc. options to click on.

Since yesterday, a click on the button directly leads to the execution of the code - without the possibility to directly debug it. If I manually attach the debugger to the already open console that is used for executing the code, all stepping-buttons are disabled.

Windows, current pyCharm Version, using a Conda environment as interpreter.

Any ideas? Thanks!