CfgIfaceTest UTs fail frequently under 22.04 VM

Several of the dhcpsrv/"CfgIfaceTest.*" tests fail sporadically for me on Ubuntu 22.04 VM:

[       OK ] CfgIfaceTest.retryOpenServiceSockets4 (104 ms)
[ RUN      ] CfgIfaceTest.retryOpenServiceSockets4OmitBound
cfg_iface_unittest.cc:752: Failure
Expected equality of these values:
  (RETRIES + 1) + 1
    Which is: 7
  total_calls
    Which is: 5
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets4OmitBound (107 ms)
[ RUN      ] CfgIfaceTest.retryDoubleOpenServiceSockets4
[       OK ] CfgIfaceTest.retryDoubleOpenServiceSockets4 (71 ms)
[ RUN      ] CfgIfaceTest.retryOpenServiceSockets6
cfg_iface_unittest.cc:879: Failure
Expected equality of these values:
  CALLS_PER_RETRY * (RETRIES + 1)
    Which is: 18
  total_calls
    Which is: 9
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6 (106 ms)
[ RUN      ] CfgIfaceTest.retryOpenServiceSockets6OmitBound
cfg_iface_unittest.cc:957: Failure
Expected equality of these values:
  (RETRIES + 1) + opened_by_eth0
    Which is: 9
  total_calls
    Which is: 5
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6OmitBound (102 ms)
[ RUN      ] CfgIfaceTest.retryDoubleOpenServiceSockets6
[       OK ] CfgIfaceTest.retryDoubleOpenServiceSockets6 (65 ms)
[----------] 20 tests from CfgIfaceTest (572 ms total)

[----------] Global test environment tear-down
[==========] 20 tests from 1 test suite ran. (573 ms total)
[  PASSED  ] 17 tests.
[  FAILED  ] 3 tests, listed below:
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets4OmitBound
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6OmitBound[       OK ] CfgIfaceTest.retryOpenServiceSockets4 (104 ms)
[ RUN      ] CfgIfaceTest.retryOpenServiceSockets4OmitBound
cfg_iface_unittest.cc:752: Failure
Expected equality of these values:
  (RETRIES + 1) + 1
    Which is: 7
  total_calls
    Which is: 5
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets4OmitBound (107 ms)
[ RUN      ] CfgIfaceTest.retryDoubleOpenServiceSockets4
[       OK ] CfgIfaceTest.retryDoubleOpenServiceSockets4 (71 ms)
[ RUN      ] CfgIfaceTest.retryOpenServiceSockets6
cfg_iface_unittest.cc:879: Failure
Expected equality of these values:
  CALLS_PER_RETRY * (RETRIES + 1)
    Which is: 18
  total_calls
    Which is: 9
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6 (106 ms)
[ RUN      ] CfgIfaceTest.retryOpenServiceSockets6OmitBound
cfg_iface_unittest.cc:957: Failure
Expected equality of these values:
  (RETRIES + 1) + opened_by_eth0
    Which is: 9
  total_calls
    Which is: 5
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6OmitBound (102 ms)
[ RUN      ] CfgIfaceTest.retryDoubleOpenServiceSockets6
[       OK ] CfgIfaceTest.retryDoubleOpenServiceSockets6 (65 ms)
[----------] 20 tests from CfgIfaceTest (572 ms total)

[----------] Global test environment tear-down
[==========] 20 tests from 1 test suite ran. (573 ms total)
[  PASSED  ] 17 tests.
[  FAILED  ] 3 tests, listed below:
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets4OmitBound
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6
[  FAILED  ] CfgIfaceTest.retryOpenServiceSockets6OmitBound

This is a sample. The number of tests which fail changes run to run.

config.report