So discourse doctor restarted your old container?
You don’t include the actual error, but I bet that it was “exit code 137”. It that’s the case you case try making the changes this describes
Warnings: overcommit_memory and Transparent Huge Pages. (I’m not clear if that post describes your to change this settings, so you night need to look elsewhere). It would be interesting to know if that solved the problem. If not, you can increase swap.
How much memory do you have?