Despite not having the item, I'm getting a NRE that's headed by the CoffeeBoost buff. Seems to also mention REX, who of which I was playing at the time I noticed these occasional NREs. I was unable to figure out specifically what was triggering them, however.
I have included the NRE lines in my pastebin. Unfortunately, the full log was too big to pastebin and I have no idea how to attach files to itch.io posts. I can send to you over Discord, I'm in the Modcord under Fishcookie#3488.
Hastebin Link: https://hastebin.com/noxitoquju.css
Thanks!