Nope, I tried removing the s and adding delayUntil 200 as the fourth line (between the write and the releaseKey) and it didnāt work. I also tried extending the delay, just in case that helped but 2000 and then 20000 made no difference (and Iām sure itās running, because with the longer delay I can visually watch the input source icon changing).
Iāll have access to an alternate macOS machine with a different OS next week. Iāll try it out there and see if the same thing happens.
If you have time, Iād be interested in understanding what the s actually does and how it compares (in theory) to the delayuntil. Iām not sure I really understand the Reference Manual because my reading of that is that the D that the write sends should āreleaseā the sticky modifier, although perhaps it actually holds until the 2, because the write acts as an atomic action?