I've seen this happen more than once:
-I manually edit a future recurring transaction more than once, to tweak the amount, because it's a credit card payment and there were new charges i want to pay off.
-The transfer was from checking to credit card, i edited at the credit card side.
-I go to checking side, and that instance of the future recurring transaction on the recurring upcoming transactions is no longer there.
I'm not posting screenshots/video for privacy reasons.
I will work around this by deleting the recurring (next) instance (dismissing it) or and creating a new one time 'recurring' transaction, or just re do the whole series.