Wow, I look forward to that!
And is there an updated acceleration weight? Now the strongest is kata1-b40c256-s10499183872-d2559211369

No idea who that is, but thanks, can't wait for it.
Also, when switching networks the position on the board resets so you need to save it every time before switching, is it possible to switch the network but remain the position without saving and downloading sgf every time?

It looks like the autosaved SGF doesn't include all the moves in order, just the final board state. Would it be possible to implement this?

Something changed in BadukAI? Previously optimized 40 blocks weights worked without a problem on Snapdragon 845. Now they make KG crash (normal non-optimized weights are still functioning).

which version and which network?

v1.12.0
"In particular, all this means, that loading an external optimized network (which consists of two files) now requires you to select both files, one after the other."
https://github.com/aki65/aki65.github.io/releases
do you do that?

Unfortunately I don't own a phone with SD 845, so I can't analyze the problem. Thus I can only hint at a few potential reasons for this:

1) Model structure
The code in BadukAI for running KG models hasn't changed for a long time, but the models themselves have (including structural changes). I wouldn't expect these to break compatibility with SD 845, but you never know. To check that, you could load the first published 40b model (from https://github.com/aki65/aki65.github.io/releases/tag/v1.4.1) and check if that one works.

2) Permissions
There are a lot of different file access permission models on different android versions, so accessing external model files can always be a problem. To check that, you could load the internal 20b network (it's also optimized) and check if that one works.

3) Operating system
Did you receive a system update from your phone's manufacturer recently ? I'm asking because BadukAI needs to access the neural processing unit (NPU) to run the optimized models. The interface, that it uses on SD 845 (and many other chipsets) to do so, was recently discovered to have some security flaws in rare circumstances. Some vendors took the easy way out: Instead of fixing the problem, they blocked the interface completely. I had this on one of my own phones some time ago. Very annoying, but nothing to be done about it.
If that also happened on your phone, it would explain the crash.

Is there an updated acceleration weight? Now the strongest is kata1-b40c256-s11101799168-d2715431527

I published a new accelerated network for Snapdragon 888 devices on android 12. For details and download go here: https://github.com/aki65/aki65.github.io/releases/tag/v1.13.2

Is it as strong as the non-optimized net at equal playouts?