As a temporary workaround, with additional logic within the code, this gets the rrd working:
1 os_ha_addons started=3|failed=0|stopped=1
This doesn’t:
P os_ha_addons started=3|failed=0;1;1|stopped=1;1
By hardcoding the status, I don’t get the warn/crit lines showing in the charts. When it works, I do see the writings/updates in /opt/omd/sites/home/var/rrdcached/rrd.journal.*.