GrandStream GXV3611_HD crashes asterisk when called using h264

PBX Firmware:6.12.65-23
FreePBX 12.0.18 all modules up to date.
Asterisk (Ver. 13.0.2)
Using Chan_SIP driver.
disallow all
When only ulaw is allowed call completes with auto answer and audio functions correctly, no video of course.
When ulaw&h264 is allowed call continues to ring and never answers.
When ringing starts on the camera the CLI dumps with:
– Executing [[email protected]:44] Dial(“SIP/xx03-0000006d”, “SIP/xx97,trI”) in new stack
== Using SIP VIDEO TOS bits 136
== Using SIP VIDEO CoS mark 6
== Using SIP RTP TOS bits 184
== Using SIP RTP CoS mark 5
– Called SIP/xx97
– Connected line update to SIP/xx03-0000006d prevented.
– SIP/xx97-0000006e is ringing
Disconnected from Asterisk server
Asterisk cleanly ending (0).
Executing last minute cleanups
[[email protected] ~]# /usr/sbin/safe_asterisk: line 164: 8242 Segmentation fault (core dumped) nice -n $PRIORITY “${ASTSBINDIR}/asterisk” -f ${CLIARGS} ${ASTARGS} > /dev/${TTY} 2>&1 < /dev/${TTY}

[[email protected] ~]#

Tried lots of settings in the camera and nothing changes. Firmware up to date.
Doing a direct IP connect to Grandstream GXV3275 works fine.
Video calls between 2 GXV3275 through PBX works fine out of the box with no special settings.

Any Ideas? These supposedly work just fine on Grandstreams little Asterisk PBX…
These cameras have a lot of functions including DTMF door controls which I would like to use through the PBX to any phone instead of hard coded to just one phone.

Set up a fresh test box identical to this config and it did exactly the same thing.
Switch-Asterisk-Version to 11 from 13 and it works fine.

13 is marked as Experimental. use with caution