imagefreeze is PLAYING but doesn't have a clock

gst_clock_new_single_shot_id: assertion 'GST_IS_CLOCK (clock)' failed

#0  _g_log_abort (breakpoint=1) at ../../../glib/gmessages.c:554
#1  0x00007f83abc8f859 in g_logv
    (log_domain=0x7f83abee02d0 <g_log_domain_gstreamer> "GStreamer", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7f83a8cd3bb0) at ../../../glib/gmessages.c:1373
#2  0x00007f83abc8fa1f in g_log
    (log_domain=<optimized out>, log_level=log_level@entry=G_LOG_LEVEL_CRITICAL, format=format@entry=0x7f83abcdf893 "%s: assertion '%s' failed") at ../../../glib/gmessages.c:1415
#3  0x00007f83abc90219 in g_return_if_fail_warning
    (log_domain=<optimized out>, pretty_function=pretty_function@entry=0x7f83abee7130 <__func__.24> "gst_clock_new_single_shot_id", expression=expression@entry=0x7f83abee6d48 "GST_IS_CLOCK (clock)") at ../../../glib/gmessages.c:2771
#4  0x00007f83abe5355a in gst_clock_new_single_shot_id (clock=clock@entry=0x0, time=time@entry=52956749365709)
    at ../subprojects/gstreamer/gst/gstclock.c:423
#5  0x00007f83ab0bf657 in gst_image_freeze_src_loop (pad=0x555b86546990 [GstPad])
    at ../subprojects/gst-plugins-good/gst/imagefreeze/gstimagefreeze.c:987
#6  0x00007f83abeb48af in gst_task_func (task=0x555b8656d830 [GstTask]) at ../subprojects/gstreamer/gst/gsttask.c:328
#7  0x00007f83abcb1d84 in g_thread_pool_thread_proxy (data=<optimized out>) at ../../../glib/gthreadpool.c:354
#8  0x00007f83abcb151d in g_thread_proxy (data=0x555b8656e180) at ../../../glib/gthread.c:807
#9  0x00007f83abc0dea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007f83abb21daf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95