ubuntu_kernel_selftests.net:xfrm_policy.sh fails on scobee - expected ping to use ipsec tunnel

Observed failures with j:linux-realtime 5.15.0-1044.49 and derivative j:linux-nvidia-tegra 5.15.0-1016.16, both on scobee-kernel.

08/08 17:37:00 DEBUG| utils:0116| Running 'make run_tests -C net TEST_PROGS=xfrm_policy.sh TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
08/08 17:37:00 DEBUG| utils:0153| [stdout] make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'
08/08 17:37:00 DEBUG| utils:0153| [stdout] make --no-builtin-rules ARCH=arm64 -C ../../../.. headers_install
08/08 17:37:00 DEBUG| utils:0153| [stdout] make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
08/08 17:37:00 DEBUG| utils:0153| [stdout] INSTALL ./usr/include
08/08 17:37:00 DEBUG| utils:0153| [stdout] make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux'
08/08 17:37:00 DEBUG| utils:0153| [stdout] TAP version 13
08/08 17:37:00 DEBUG| utils:0153| [stdout] 1..1
08/08 17:37:00 DEBUG| utils:0153| [stdout] # selftests: net: xfrm_policy.sh
08/08 17:37:24 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .254 to use ipsec tunnel
08/08 17:37:44 DEBUG| utils:0153| [stdout] # PASS: ping to .254 bypassed ipsec tunnel (exceptions)
08/08 17:38:04 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .253 to use ipsec tunnel (exceptions)
08/08 17:38:24 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .2 to use ipsec tunnel (exceptions)
08/08 17:38:44 DEBUG| utils:0153| [stdout] # PASS: ping to .254 bypassed ipsec tunnel (exceptions and block policies)
08/08 17:39:04 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .253 to use ipsec tunnel (exceptions and block policies)
08/08 17:39:24 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .2 to use ipsec tunnel (exceptions and block policies)
08/08 17:39:45 DEBUG| utils:0153| [stdout] # PASS: ping to .254 bypassed ipsec tunnel (exceptions and block policies after hresh changes)
08/08 17:40:05 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .253 to use ipsec tunnel (exceptions and block policies after hresh changes)
08/08 17:40:25 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .2 to use ipsec tunnel (exceptions and block policies after hresh changes)
08/08 17:40:50 DEBUG| utils:0153| [stdout] # PASS: ping to .254 bypassed ipsec tunnel (exceptions and block policies after hthresh change in ns3)
08/08 17:41:10 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .253 to use ipsec tunnel (exceptions and block policies after hthresh change in ns3)
08/08 17:41:30 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .2 to use ipsec tunnel (exceptions and block policies after hthresh change in ns3)
08/08 17:41:57 DEBUG| utils:0153| [stdout] # PASS: ping to .254 bypassed ipsec tunnel (exceptions and block policies after htresh change to normal)
08/08 17:42:17 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .253 to use ipsec tunnel (exceptions and block policies after htresh change to normal)
08/08 17:42:37 DEBUG| utils:0153| [stdout] # FAIL: expected ping to .2 to use ipsec tunnel (exceptions and block policies after htresh change to normal)
08/08 17:42:37 DEBUG| utils:0153| [stdout] # PASS: policies with repeated htresh change
08/08 17:42:57 DEBUG| utils:0153| [stdout] # PASS: policies inserted in random order
08/08 17:42:57 DEBUG| utils:0153| [stdout] not ok 1 selftests: net: xfrm_policy.sh # exit=1
08/08 17:42:57 DEBUG| utils:0153| [stdout] make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'
08/08 17:42:57 ERROR| test:0414| Exception escaping from test:
Traceback (most recent call last):
  File "/home/ubuntu/autotest/client/shared/test.py", line 411, in _exec
    _call_test_function(self.execute, *p_args, **p_dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 823, in _call_test_function
    return func(*args, **dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 291, in execute
    postprocess_profiled_run, args, dargs)
  File "/home/ubuntu/autotest/client/shared/test.py", line 212, in _call_run_once
    self.run_once(*args, **dargs)
  File "/home/ubuntu/autotest/client/tests/ubuntu_kernel_selftests/ubuntu_kernel_selftests.py", line 282, in run_once
    raise error.TestError(test_name + ' failed.')
TestError: net:xfrm_policy.sh failed.