Question about Toffsets and Authsae

I have been doing more testing to identify why stations will randomly go
into LISTEN Mode.
I have noticed the Toffset state changes to a negative number and never
resets to a positive number.
Could this effect the negotiations between authentication after authsae
lifetime expire?
Is there a reason the Toffset would ever need to be a negative number?

This is the state of the two units that dropped there connection.

Station 00:15:6d:5d:4f:76 (on mesh0)
    inactive time:    1733 ms
    rx bytes:    22508
    rx packets:    442
    tx bytes:    1020
    tx packets:    6
    tx retries:    1
    tx failed:    0
    signal:      -56 dBm
    signal avg:    -59 dBm
    Toffset:    176566414740 us
    tx bitrate:    1.0 MBit/s
    mesh llid:    0
    mesh plid:    0
    mesh plink:    LISTEN
    authorized:    yes
    authenticated:    yes
    preamble:    long
    WMM/WME:    yes
    MFP:        no
    TDLS peer:        no

Station 00:15:6d:5d:6e:6b (on mesh0)
    inactive time:    652 ms
    rx bytes:    4025
    rx packets:    42
    tx bytes:    892
    tx packets:    5
    tx retries:    0
    tx failed:    0
    signal:      -54 dBm
    signal avg:    -55 dBm
    Toffset:    -176566414742 us
    tx bitrate:    1.0 MBit/s
    mesh llid:    0
    mesh plid:    0
    mesh plink:    LISTEN
    authorized:    yes
    authenticated:    yes
    preamble:    long
    WMM/WME:    yes
    MFP:        no
    TDLS peer:        no

If I restart the mesh that has the negative variable in Toffset
every comes back online with ESTAB and traffic flows nicely.
and of course MFP turns to yes on both units.

BTW using the latest builds from git.


Any assistance would be appreciated.

Fred
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