I already tried that. It didn’t work.

However, I now know the solution. I have to use HS(M) – that is, with the suffix M (for momentary) – then it’s not a toggling function.
Although I find the M (for momentary) misleading… because “momentary” means something else to me. It should rather be L (for latching).

explained in this video at 19:40:
https://www.youtube.com/watch?v=tfd3wQHzxcA