Resolved! The timing for reading the ADC with DMA seems way too long. I calculate just under 36 us to read 8 ADC channels with a STM32L443CCT running at 64 MHz.
I am trying to trigger every millisecond, or 1000 microseconds, but my counters in the interrupt are seeing 167 interrupts per second as opposed to the expected 1000 interrupts per second.I am reading 6 channels with a sample rate of 92.5 clocks per ...