If I Delay Until thirty minutes or so ahead, I get this error before the delay elapses.
Flow run timed out. Please try again.
Otherwise, the Flow designer still shows the Delay Until Action with it's little orange clock-like icon suggesting it is waiting, still.
I'm going to leave everything alone for a few more minutes to see if this is another red (no pun intended) herring. I seem to recall other cases like this that i did not expect to see the subsequent email appear.
In any case, what is the documented time out threshold for Delay Until?
