I have mine HA behind OPNSense HAProxy. It was working fine, but something has changed and now the mobile app asks to retry. Mostly 3 times. The log file contains events like:
<134>1 2026-04-21T16:59:01+02:00 fw.loc haproxy 72963 - [meta sequenceId=“1”] 78.80.18.199:62890 [21/Apr/2026:16:59:01.668] ha_https/0.0.0.0:54806: SSL handshake failure (error:0A0000C7:SSL routines::peer did not return a certificate)
or
<134>1 2026-04-21T17:43:39+02:00 fw.loc haproxy 83379 - [meta sequenceId=“145”] 192.168.10.110:54974 [21/Apr/2026:17:43:39.750] ha_https/0.0.0.0:54806: SSL handshake failure
Unfortunatelly I do not know if it is related to OPNSense update or HA or HA mobile app or event something else. How to debug?