App has stalled and doesn't scale up

It’s stalled with these logs:

2022-11-18T06:18:58Z runner[c0e496d5] fra [info]Shutting down virtual machine
2022-11-18T06:18:58Z app[c0e496d5] fra [info]Sending signal SIGINT to main child process w/ PID 520
2022-11-18T06:18:59Z app[c0e496d5] fra [info]Starting clean up.

It had deployment strategy set to “rolling”.

This is our production server and unfortunately nothing (scale up, down, restart, vm stop) seems to have an effect.