Resolved! Powering up a 5 volt tolerant external pull up.
Does anyone have experience with 5V pull ups? do you have to power on the 5V source after the MCU is started?I'm running a STM32L431CBT6 with external 5 volt 10k pull-ups on the pins PB11,12,13,14,15 and PA1. (all flagged as FT pins)I've been able t...