So uninstalled and reinstalled it sounds like possible corrupted data but lots of building can cause severe problems and crashes I will try to give you more details but I just got if 12 hour sift and need to sleep and work one more and I try to give more help but try that
Could you let us know which console model you have, and where your game is installed to (original internal drive, external, SSD)?
Is your console stable playing other games or does it show any signs of overheating?
Please ensure that your save is stored on the XBOX cloud before trying each of the following steps and letting us know if they help:
Reset the console cache by holding the power button for about 10 seconds until the console powers off, then disconnecting it from the power outlet for a couple of minutes, then try loading into your SP session.
Try to perform a soft factory reset while keeping games and apps.
If the above procedures don’t help, please try to perform a full reinstall of the game.
Im having same kinds of issues, some of the crashes seems totally random but some of them happens at same places like walking past player made big buildings with lots of placeables or when loading into your own base with lots of placeables.
Also sometimes its possible to see NPC respawns at your location and causes instant crash. Being in wrong place at wrong time?
Playing online and running in one direction when crash happens, character keeps running for a while, once my body was far away behind cursed wall, not sure is it possible abuse to get past cursed wall death zone this way.
I did move my Conan Exiles to external SSD and everything seems to load faster, but it did not fix crashing issues.