I've had multiple RCs fail during false awakening.

The suggestion to me after posting that very alarming incident here was to avoid doing RCs as simple routines. Make sure I am thinking through all that goes with them:

Am I dreaming?
How did I get here?

etc.

Since I've been more careful about thinking through my RCs, none have failed.

In context, you were not really DOING RCs... you were really just demonstrating them for somebody else and thinking about them in that manner.