[Bug]: dualtor_mgmt/test_toggle_mux.py has low passing rate in KVM PR test

[xwjiang-ms]

Issue Description

dualtor_mgmt/test_toggle_mux.py has low passing rate in KVM PR test

Results you see

Passing rate:

Error message:

>           pytest.fail('Toggle mux from simulator test failed')
E           Failed: Toggle mux from simulator test failed

check_result = False
duthosts   = [<MultiAsicSonicHost vlab-05>, <MultiAsicSonicHost vlab-06>]
get_mux_status = <function get_mux_status.<locals>._get_mux_status at 0x7baf5e6b0550>
simulator_muxstatus = {'mbr-vms6-4-0': {'active_port': 'vlab-06-1', 'active_side': 'lower_tor', 'bridge': 'mbr-vms6-4-0', 'flap_counter': 1,...11': {'active_port': 'vlab-06-12', 'active_side': 'lower_tor', 'bridge': 'mbr-vms6-4-11', 'flap_counter': 3, ...}, ...}

Results you expected to see

The passing rate of dualtor_mgmt/test_toggle_mux.py is higher than 95%

Is it platform specific

generic

Relevant log output

No response

Output of show version

No response

Attach files (if any)

No response

[xwjiang-ms]

@lolyu could you help to take a look?