Don't know if it was my mac that caused it but something screwed up the pairing for 2 keyboards. Bluetooth would show them connected after waking u from sleep but they wouldn't send keypresses unless I re-paired them.

Turns out you needed to clear the 'bond' list from the keyboard side (resetting your laptop's bluetooth 50 times doesn't work, I tried).

If you're unlucky (first time it's happened to me) enough to run into issues, here's the [solution](https://forums.adafruit.com/viewtopic.php?f=57&t=143309)

In the future, I may think about implementing a hard-reset via key combinations to do this. In the mean time, I'll assume since you're building this, you have enough basic Arduino knowledge to do it through code.