Try this…
Open up a scene explorer for easy selection
Start a slow Stoke Simulation
Select any other object in the scene explorer (or click on it in the view)
Switch back to the Stoke.
The Stop button has reverted to “Simulate”
There is no way to cancel the simulation!
I tried ESC as well.
Ideally this would not happen. Or at the very least maybe you could read the ESC key periodically to check for it to cancel.