I also experience this crash quite frequently. In particular with any 4K Frozen Remux you can find around just after 36:00 when Anna approaches the Swiss hut.
There has also been a simultaneous discussion going on in the LE forums: https://forum.libreelec.tv/thread/20870-libreelec-crashes-in-the-middle-of-the-4k-movie-on-raspberry-pi4/
I have found that the crash is more likely to occur with any movie when skipping, but it ALWAYS crashes on Frozen at the mentioned play time.
Here’s my crash log when skipping through: https://paste.ubuntu.com/p/F9mWZZWBCS/
And the one only happening at the specific position in the movie during normal playback: http://ix.io/24a6
I’m streaming from a NAS via smb.
I’m running CE 9.2.1 on an Odroid N2, but experienced it even before CE 9.2. I tested the same source material on a virtual machine with most recent LE installed, but interestingly enough no issue there. Maybe an anomaly with the HEVC decoding happening on the Odroid?
The crashes are really nasty 