Had Dynamic home point on
I know that it must be hard to read my well meant advice afterwards, with your bird already in pieces. And maybe you're already an experienced pilot with just an incredible bad luck.....But what I write here is also for other folks who might want to learn from others experience. A lot (if not most) of crashes happen while in forced RTH, so it's important enough.
Make a preflight check list (do it, really) and follow it to the letter. If you ever plan to use dynamic homepoint, have a flight plan or strategy, and follow that. Check the immediate surroundings before even thinking of using it.
Never stand under or close to anything or anybody with dyn. homepoint on. And always make sure the path to your dynamic or initial takeoff homepoint is clear (from all directions if possible). If the TX shuts off there's literally no way to set a new homepoint, and the bird will just fly to the last set homepoint, on the preset RTH height, regardless of structures, trees etc. If it wandered away because of a malfunction and it enters RTH, it might come from an entirely different direction then you anticipated it ever would, before take off. Remember, if RTH kicks in because of a malfunction, the bird will fly completely autonomously and it will crash into anything on it's path, unless you regain control somehow.
I always stay clear from overhanging roofs, balconies etc, and try not to stand under trees or close to walls, unless I set a hard homepoint somewhere in the clear. I always want a clear path to the homepoint, from any direction, just in case the unexpected happens. It is an important early step in my preflight check list.
Unfortunately everything can fail and we have to be prepared for that, before every flight.
I never use dynamic homepoint because the TX GPS reception is poor most of the time. But it is in the checklist anyhow. The software might glitch unexpectedly and change the homepoint to dynamic in flight, one bad day, who knows.
And TX's always can fail unfortunately. I would definitely contact DJI support in your case.
Is your remote back to normal after cooling down?
Really sorry for your damage, this is something you just don't expect to happen.
But unfortunately, now you know you should, actually....
Thanks for sharing your misfortune anyhow. It's a lesson to most of us.