Just seeing this thread, as recently joined the forum. So sorry for my late 2 penny worth, and I hope you have resolved the shoddy treatment by BMW.
This is an unusual but not unknown problem.
Probably, like airbags, only a few suppliers make these .. so likely what was reported for the F Type may transfer to other marks.
When I had the Jag 4 years ago, there were reports on that forum of the same thing happening. No collision but going over a speed humps was one cause. Could this be yours?
The writer claimed ‘not going very fast’, but we know design of speed bumps is a black art. Also the G shock is variable, as seen from data from BlackVue camera system .
I have to question whether Sport and Sports Plus setting , could augment this problem?