Simultaneous "Brake" + "Trans. Failsafe Prog" alerts

[BCM_X5]

(I realize "joeboch348" recently posted with a similar error but I didn't want to hijack his thread. It also seems that the "Trans. Failsafe Prog" message can be the result of a dozen+ causes)

After driving my 2004 X5 4.4i (81k on the clock) about a mile today I noticed an amber "Brake" light on the instrument panel. I thought this was odd since I had a PPI done on the car less than 1k miles ago and they did not mention the pads. I pulled over a few blocks later to Google it, killed the motor and saw for the first time ever the "Trans. Failsafe Prog" message. The vehicle had been driving normal and utilizing all gears up to that point, best I could recall.

I let it sit for maybe an hour, started it back up and both messages persisted. Drove it another ~mile parked, sat another ~hour, and now both alerts are gone.

The battery was replaced with an OEM unit less than 600 miles ago by my indy. Previous to today we took it for a long drive (300mi) on Wednesday without issue.

In the PPI my indy did identify that the transmission connector was wet with transmission fluid and that it needed to be resealed. I asked them to rank each finding and that one was prioritized last. I'm not aware of any other brake or trans issues with the car, past or present.

I'm sure they prevailing response will be to take it back to my indy for eval but I thought maybe the occurrence of both the "Brake" and "Trans. Failsafe Prog" messages appearing (and disappearing) at the same time would elicit some ideas here. I plan to check the brake fluid levels tomorrow.

I'll post a root-cause follow up to hopefully help others in the future.

Thanks as always for your thoughts,