Pi1 B+ with official Pi power supply, tried with two separate SD cards
I’m getting very frequent crashes on:
Editing and system settings e.g device name, audio output 50% of the time
Scanning for new content on external, powered HD
Navigating menus whilst it nis playing music over airplay
Edit: it usually just freezes indefinitely, but more recently, it will freeze, show a square sad face icon and then reboot quickly
Bring the clock speeds down, I don’t know why by default so many Raspberry OS’s come with the clock speeds set high. Mine crashes constantly like yours at the default 850Mhz that comes with OSMC, drop it back to 700Mhz the Pi default and see how you go.
In kodi, you can go to Programs > OSMC settings > Overclock.
In there it says what the setting is and what you can change it to, from memory I dropped mine back to Pi Defaults.
BTW the ‘Normal’ setting is Overclocked not Pi defaults.