elements_netsim.netsim_stress: Sometimes fails with "Got data flow before stream-start event"

check.gst-plugins-bad.elements_netsim.netsim_stress: Failed 'Application returned 1'
       You can reproduce with: GST_STATE_IGNORE_ELEMENTS='' GST_CHECKS='netsim_stress' GST_PLUGIN_SYSTEM_PATH_1_0='' CK_DEFAULT_TIMEOUT='20' GST_REGISTRY='/builds/tpm/gst-plugins-bad/gst-build/build/subprojects/gst-plugins-bad/tests/check/elements_netsim.registry' GST_PLUGIN_PATH_1_0='/builds/tpm/gst-plugins-bad/gst-build/build' /builds/tpm/gst-plugins-bad/gst-build/build/subprojects/gst-plugins-bad/tests/check/elements_netsim

Dumping log files on failure

Dumping contents of /builds/tpm/gst-plugins-bad/validate-output/logs/check/gst-plugins-bad/elements_netsim/netsim_stress

=================
Test name: check.gst-plugins-bad.elements_netsim.netsim_stress
Command: '/builds/tpm/gst-plugins-bad/gst-build/build/subprojects/gst-plugins-bad/tests/check/elements_netsim'
=================

Running suite(s): netsim


Unexpected critical/warning: ../subprojects/gstreamer/gst/gstpad.c:4292:gst_pad_chain_data_unchecked:<netsim0:sink> Got data flow before stream-start event

Stack trace:
gst_debug_get_stack_trace (gstinfo.c:2788)
gst_check_log_critical_func (gstcheck.c:281)
g_logv (/usr/lib64/libglib-2.0.so.0.5800.1:0x7f828b2c66db)
g_log (/usr/lib64/libglib-2.0.so.0.5800.1:0x7f828b2c68cf)
gst_pad_push_data (gstpad.c:4290)
gst_pad_push (gstpad.c:4701)
gst_harness_stress_buffer_func (gstharness.c:2936)
?? (/usr/lib64/libglib-2.0.so.0.5800.1:0x7f828b2e8486)
start_thread (/usr/lib64/libpthread-2.28.so:0x7f828b25558a)
__clone (/usr/lib64/libc-2.28.so:0x7f828b18464f)

0%: Checks: 1, Failures: 1, Errors: 0
../subprojects/gstreamer/libs/gst/check/gstcheck.c:286:F:general:netsim_stress:0: Unexpected critical/warning: ../subprojects/gstreamer/gst/gstpad.c:4292:gst_pad_chain_data_unchecked:<netsim0:sink> Got data flow before stream-start event
Check suite netsim ran in 0.804s (tests failed: 1)