The Relay Search Results table doesn't show the IPv6 capability of a bridge

The ORPort is reachable (tested from another IPv6 system in a different network segment), the torrc looks like:

# torrc
#

SocksPort 0
ORPort auto
ORPort [<snip>]:auto
BridgeRelay 1
Exitpolicy reject *:*

RunAsDaemon 1
ControlPort 9051
ServerTransportPlugin obfs4 exec /usr/bin/obfs4proxy

ContactInfo replace k with c : kontakt @ zwiebeltoralf . de
Nickname zwiebeltoralf3

Log warn file /var/log/tor/warn.log

# for arm
#
DisableDebuggerAttachment 0

The metrics link is: https://metrics.torproject.org/rs.html#details/662D4E4DE2C883625C543DFA3C4EE466899E6C85