I am not sure what the true cause is, or if i actually fixed it, but I haven't had any issues in the last month. The issue is not the bluetooth (as i previously posted). I made multiple changes which seemed to have stopped the issue, so I suggest you give them a shot and post back to verify if any of these helped.

What i did determine is the Ibus gets bus contention causing the radio to shut off. It is an active high bus, and something gets stuck pulling it down. It is not the mediabridge pulling the bus down, as when i disconnect it, the bus is still pulled down. However the mediabridge likely caused bus contention causing another system to get stuck pulling the bus down. I noticed that the issue of the radio shutting off would occur when I let my car sit for a week or two without driving it. This led me to believe that when the mediabridge is connected to the Ibus, it increases sensitivity to low voltage conditions which occur when the battery hasn't been actively charged by the alternator. I also only drive 2 miles to work every day which is a known problem for the battery not getting fully charged as noted in the BMW manual.

The following changes i made were:

1)Make sure to flash your Mediabridge has the latest software. Turn off scroll mode to reduce traffic it creates on the Ibus.

2)Try disconnecting your battery for longer, say an hour or two in case it didn't totally reset the system.

3)Meanwhile use a trickle charger to charge your battery. How old is your battery? I found the my 7 year old battery had good voltage, but when i used a load tester it performed about ~50%. I thought this could be the issue as the ibus is sensitive to low voltage conditions such as when i haven't been driving the car. I ended up replacing my battery a month ago and haven't had any issues.

4)Make sure you didnt hook up an amp for a sub and use the Ibus as the remote.

5)Check fuses 71-76 in the right rear panel of the car. After 3 months of the issue, and the same time i decided to replace my battery, the system shut off for the 5th time, however this time the 30 minute reset did not work. I noticed fuse 75 was blown. I had checked these fuses each time, so this was the first time it caused the fuse to blow. I replaced this fuse, the battery, and it has been working well since.

Good luck, the system is amazing when it is working properly.

-Nick