I am also experiencing this issue. Not at the level @trpropst has, but we are now doing work to make our firmware resilient to unexpected resets.
Oscilloscope:
We are also considering making an adapter board that fits between feather headers in order to add the suggested resistor / cap.
@trpropst, what was your final fix for this? Resistor to VBAT and capacitor to EN-GND? Or just capacitor EN-GND? Has this fix held up in the field?
@rickkas7, why isn’t this issue and other EN related issues in the Boron’s datasheet? There is an empty section for known errata. It seems like this should be on there, as well as leakage to EN pin, 124 day bug, etc.