Tried upgrading to 13.0-90.11 instead. Same crash immediately after failover.
nsppe: PE 2 (pid 661) got signal 11; signal mask is 0x0 0x0 0x0 0x0
pitboss Wed May 10 100536 2023 NSPPE-02 (661) unexpectedly died due to receiving signal
I have upgraded 10+ HA-pairs to both 13.1-45.61 and 13.1-45.63 without problems. All from the same version (13.0-88.14).
Fun.