SKL PNV GEN9 BSW: igt@kms_sequence@queue-(idle|busy) | igt@kms_sequence@queue-idle@edp-1-pipe-c - fail - Failed assertion: cgs_end.sequence == target

https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19470/shard-skl1/igt@kms_sequence@queue-busy.html

Out	
IGT-Version: 1.25-g2ac1307bb (x86_64) (Linux: 5.11.0-rc4-CI-Patchwork_19470+ x86_64)
Starting subtest: queue-busy
Beginning queue-busy on pipe A, connector eDP-1 (1 threads)
Time per frame from queue to event (busy):       16.672ms( 59.982Hz)

queue-busy on pipe A, connector eDP-1: PASSED

Beginning queue-busy on pipe B, connector eDP-1 (1 threads)
Stack trace:
  #0 ../lib/igt_core.c:1727 __igt_fail_assert()
  #1 ../tests/kms_sequence.c:259 sequence_queue()
  #2 [<unknown>+0x1]
child 0 failed with exit status 98
Subtest queue-busy: FAIL (6.758s)
Err	
Starting subtest: queue-busy
(kms_sequence:912) CRITICAL: Test assertion failure function sequence_queue, file ../tests/kms_sequence.c:260:
(kms_sequence:912) CRITICAL: Failed assertion: ev.sequence == target
(kms_sequence:912) CRITICAL: error: 141 != 144
Subtest queue-busy failed.