S3:E8 David Fumbling Multiple Calls to Patrick- was it because he was just high?

I’m on my third rewatch now and the first two times I saw this episode, I thought David messed up all the voicemails to Patrick because he was flustered by him/the start of emotions etc. But today I just noticed that in the scene immediately before Stevie finds a joint while cleaning the rooms and asks David if he wants to smoke. So did David just mess up the voicemails because he was high? In his next interactions with Patrick, he doesn’t seem flustered by him.

(Sorry etc. if this point has been raised before, only joined the sub a few months back)