There was a post previously about restoring the unit to factory. You may consider doing that then applying the Jan update. Just a thought.
That may have been my post. I have read of a late January and March CANBUS updates. All I know is the one that was released to correct an issue with the cooling seats not working, Guy had originally posted as well as the img update that was released on 26 Feb 2019.
I am running both, had asked for a previous version of the CANBUS but never got one.
They did send me the xml files that when installed reset the "Settings" and "advanced Settings" back to how they were when the units shipped. It does not remove any of your apps or anything else. It is just a settings reset. Many of the settings are hard to understand what they actually effect. I am sure there are some that do multiple things.
I tried the following as an example. You are parked and go into Advanced Settings and look for the Soft Reverse. Put foot on brake and put into reverse and the cameras should popup on screen. Pu into park and the advanced settings screen should pop back on and toggle the Soft Reverse setting. Don't save or anything, now put into reverse and the cameras do not load. Put back into park and toggle back to original setting.
With that, I think many of the settings can actually be tested without the save and reboot and waiting for the whole reboot process to happen.
In one of their videos they state that if your unit does not have the save and reboot button options then just turn off vehicle, open and close door and turn back on.
So I am thinking that changing option in settings may take effect immediately as you change them so be careful and recommend making specific notes on any changes you make and the resulting effect that change has.
Maybe we can get a settings list put together to help all of us.
Sorry home with the flu and rambling on.