[METALLB] Speaker pod stuck in crashloopbackoff due to "error":"open /etc/ml_secret_key/secretkey: no such file or directory

All speaker pods stuck in crashloopbackoff. Re-creating metallb CR doesn't work:

$ oc get pods -l component=speaker -n metallb-system 
NAME            READY   STATUS             RESTARTS       AGE
speaker-2ks47   5/6     CrashLoopBackOff   6 (111s ago)   7m56s
speaker-4bcc8   5/6     CrashLoopBackOff   6 (105s ago)   7m55s
speaker-68hk9   5/6     CrashLoopBackOff   6 (95s ago)    7m56s
speaker-6lqpb   5/6     CrashLoopBackOff   6 (2m5s ago)   7m56s
speaker-8pxzf   5/6     CrashLoopBackOff   6 (105s ago)   7m55s
speaker-mhkvm   5/6     CrashLoopBackOff   6 (109s ago)   7m56s
speaker-qzptv   5/6     CrashLoopBackOff   6 (110s ago)   7m56s
speaker-rjq9m   5/6     CrashLoopBackOff   6 (98s ago)    7m56s
speaker-v99zn   5/6     CrashLoopBackOff   6 (102s ago)   7m55s
speaker-vspfk   5/6     CrashLoopBackOff   6 (103s ago)   7m56s
speaker-zk259   5/6     CrashLoopBackOff   6 (100s ago)   7m55s

$ $ oc logs -c speaker speaker-68hk9 -n metallb-system
{"branch":"rhaos-4.11-rhel-8","caller":"main.go:94","commit":"2109a9ce65adeb1ee00fca6c78eb8a91988f4541","goversion":"gc / go1.18.10 / amd64","level":"info","msg":"MetalLB speaker starting (commit 2109a9ce65adeb1ee00fca6c78eb8a91988f4541, branch rhaos-4.11-rhel-8)","ts":"2023-06-20T10:57:40Z","version":""}
{"caller":"main.go:126","error":"open /etc/ml_secret_key/secretkey: no such file or directory","level":"error","msg":"failed to read memberlist secret key file","op":"startup","ts":"2023-06-20T10:57:40Z"}

OCP 4.11.43

Every time

1. Install metallb operator and create metallb CR

All speaker pods crash and never start

Speaker pods to start all containers

This happened suddenly after restarting pods in 4.11.38 without any change done. Upgrading to 4.11.43 didn't do anything