WAM crash on Raspberry Pi 3 / master

I'm getting this crash on current AGL master, on RPi3:

Aug 31 11:52:13 raspberrypi3 kernel: Unhandled prefetch abort: breakpoint debug exception (0x002) at 0x728fd1c8
Aug 31 11:52:13 raspberrypi3 kernel: audit: type=1701 audit(1567252333.000:11): auid=4294967295 uid=1001 gid=1001 ses=4294967295 subj=System pid=452 comm="WebAppMgr" exe="/usr/bin/WebAppMgr" sig=5 res=1
Aug 31 11:52:13 raspberrypi3 audit[452]: ANOM_ABEND auid=4294967295 uid=1001 gid=1001 ses=4294967295 subj=System pid=452 comm="WebAppMgr" exe="/usr/bin/WebAppMgr" sig=5 res=1
Aug 31 11:52:13 raspberrypi3 WebAppMgr[452]: [0831/115213.014582:FATAL:wayland_buffer_manager.cc(386)] zwp_linux_buffer_params.create failed

Build config:

Build Configuration:
BB_VERSION = "1.40.0"
BUILD_SYS = "x86_64-linux"
NATIVELSBSTRING = "universal"
TARGET_SYS = "arm-agl-linux-gnueabi"
MACHINE = "raspberrypi3"
DISTRO = "poky-agl"
DISTRO_VERSION = "8.90.0+snapshot-20190831"
TUNE_FEATURES = "arm armv7ve vfp thumb neon vfpv4 callconvention-hard"
TARGET_FPU = "hard"
meta-raspberrypi = "HEAD:c71d79efc5a06a0c896c278c94f5b14413bb4d69"
meta-qt5 = "HEAD:1520d5b2b2beec5e1c3209d3178219e93ef08bca"
meta-agl-profile-graphical-qt5
meta-agl-profile-graphical = "HEAD:dcda26bd13b88f51a197324d4894fe189f9dc504"
meta-pipewire
meta-html5-framework = "HEAD:ca764441c712804d00562f838a4ef00c881750e9"
meta-agl-demo = "HEAD:63d61630c728adaa3465c8f319e586a765d9804b"
meta-oe
meta-multimedia
meta-networking
meta-python
meta-filesystems = "HEAD:9b3b907f30b0d5b92d58c7e68289184fda733d3e"
meta-agl-profile-core
meta-agl-distro
meta-agl-bsp = "HEAD:dcda26bd13b88f51a197324d4894fe189f9dc504"
meta-security = "HEAD:31dc4e7532fa7a82060e0b50e5eb8d0414aa7e93"
meta-perl = "HEAD:9b3b907f30b0d5b92d58c7e68289184fda733d3e"
meta-security
meta-app-framework = "HEAD:dcda26bd13b88f51a197324d4894fe189f9dc504"
meta
meta-poky = "HEAD:d43a86de1a37ce9daede726a49231547a21429a5"