Can anyone pls explain how come

delay

sometimes takes 30m instead of expected 4m (that were supplied as argument)? It is observed on Android.

Maybe you're running this

delay()

in a dispatcher with a limited number threads, and running blocking code in that same dispatcher at the same time, which would prevent it from resuming other coroutines. Could you please share a bit more details about those coroutines?

App/device put in deep sleep

@Joffrey thx, but probably not it, since I have reproduced with MainDispatcher and I would expect ANRs in that case @louiscad Thank you, that explains it. Today I learned that delay has Android specific implementation.