Version: 54.0.2840.13 /8743.13.0

What steps will reproduce the problem?
(1) recover the DUT
(2) run "tail -f /var/log/eventlog.txt" 
(3) do some suspend-resume using closing/opening DUT lid 

What is the expected output?
file should show event logs

What do you see instead?

observed following message
========================================
localhost / # tail -f /var/log/eventlog.txt 
unavailable
tail: /var/log/eventlog.txt: file truncated
usage: mosys [options] [commands]

  Options:
    -k            print data in key=value format
    -l            print data in long format
    -s [key]      print value for single key
    -v            verbose (can be used multiple times)
    -f            force (ignore mosys lock, sanity checks, etc)
    -t            display command tree for detected platform
    -S            print supported platform IDs
    -p [id]       specify platform id (bypass auto-detection)
    -h            print this help
    -V            print version

  Commands:
    ec            EC information
    eeprom        EEPROM Information
    gpio          GPIO Information
    memory        Memory Information
    nvram         NVRAM information
    platform      Platform Information

tail: /var/log/eventlog.txt: file truncated
unavailable
========================================

Observed same behavior on two daisy machine. 
Other boards looked okay (tested on cave,jerry).