On both i.MX6 and Raspberry Pi 3, pipewire crashes on startup with:

Jun 12 20:57:40 raspberrypi3 systemd[287]: Started Multimedia Service.
Jun 12 20:57:40 raspberrypi3 audit[594]: ANOM_ABEND auid=0 uid=0 gid=0 ses=3 subj=System pid=594 comm="pipewire" exe="/usr/bin/pipewire" sig=7 res=1
Jun 12 20:57:40 raspberrypi3 kernel: Alignment trap: not handling instruction f9028a1f at [<763a5cfc>]
Jun 12 20:57:40 raspberrypi3 kernel: Unhandled fault: alignment exception (0x801) at 0x017d2e84
Jun 12 20:57:40 raspberrypi3 kernel: pgd = 974dc000
Jun 12 20:57:40 raspberrypi3 kernel: [017d2e84] *pgd=1742d835, *pte=0f09c75f, *ppte=0f09cc7f
Jun 12 20:57:40 raspberrypi3 kernel: audit: type=1701 audit(1560373060.169:11): auid=0 uid=0 gid=0 ses=3 subj=System pid=594 comm="pipewire" exe="/usr/bin/pipewire" sig=7 res=1