PostgreSQL resource fails to start with "My data may be inconsistent"

After setting up a PostgreSQL resource in a 2-node Focal cluster and trying to switch the Master and Slave, I got the following failure:

Failed Resource Actions:
  * postgresql_start_0 on focal01 'error' (1): call=78, status='complete', exitreason='My data may be inconsistent. You have to remove /var/lib/pgsql/tmp/PGSQL.lock file to force start.', last-rc-change='1970-01-01 05:56:56Z', queued=437ms, exec=115773ms

This is a known issue described here:

https://www.suse.com/support/kb/doc/?id=000019252

The workaround is to remove the /var/lib/pgsql/tmp/PGSQL.lock file and put the node back online with 'crm node online <node name>'

As reference this is my CIB:

node 1: focal01
node 2: focal02
primitive postgresql pgsql \
 params pgctl="/usr/lib/postgresql/12/bin/pg_ctl" pgdata="/var/lib/postgresql/12/main" psql="/usr/bin/psql" config="/etc/postgresql/12/main/postgresql.conf" rep_mode=sync master_ip=192.168.3.3 repuser=replicator restart_on_promote=true check_wal_receiver=true node_list="focal01 focal02" \
 op monitor timeout=30 interval=2
primitive vip_public IPaddr2 \
 params ip=192.168.3.4 cidr_netmask=24 \
 op monitor interval=10s
primitive vip_replica IPaddr2 \
 params ip=192.168.3.3 cidr_netmask=24 \
 op monitor interval=10s
ms master_postgresql postgresql \
 meta notify=true master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 target-role=Master
location cli-ban-vip_public-on-focal01 vip_public role=Started -inf: focal01
order order-vip_replica-psql_master-vip_public inf: vip_replica:start master_postgresql:promote vip_public:start
colocation psql_master_and_vips inf: master_postgresql vip_public vip_replica
property cib-bootstrap-options: \
 have-watchdog=false \
 dc-version=2.0.3-4b1f869f0f \
 cluster-infrastructure=corosync \
 cluster-name=cluster01 \
 stonith-enabled=false \
 last-lrm-refresh=1603131710
rsc_defaults rsc-options: \
 resource-stickiness=100