[rcxdude]

They are async across operations that do 'yield', i.e. when the function eventually runs an i/o operation or sleep or similar. Those are the points where the functions can be interleaved. Simply awaiting another function is _not_ one of those points: await here only means the called function might yield to the scheduler at some point in its execution (it doesn't have to!), not that the calling function will yield immediately.

[fluoridation]

Isn't asyncio.sleep one of those functions? "other" should be able to appear between "parent before" and "parent after".

[rcxdude]

Yes, but not between "parent before" and "child start" (or between "child end" and "parent after")

[fluoridation]

Ah, OK. That makes sense.