"Restarted by CaOs"

On some PMP 450i AP's onboarded on cnMaestro we have this error with random reboots.

******System Startup******
System Reset Exception -- Restarted by CaOs
Cur ExtInt 0 Max ExtInt 0 Cur DecInt 0 Max DecInt 0 Cur Sync 0 Max Sync 0 Cur LED 1 Max LED 36 Cur WDOG 0 Max WDOG 36 Cur EthXcvr 0 Max EthXcvr 0 Cur FEC 0 Max FEC 0 Cur FPGA 0 Max FPGA 3568 Cur FrmLoc 0 Max FrmLoc 0 Cur WatchDog 33 Max WatchDog 33 RTMLogStats 1 AAState 0
Software Version : CANOPY 15.0.1 AP-AES
Board Type : P13
Device Setting : 5.7GHz MIMO OFDM - Access Point - 0a-00-3e-XX-XX-XX - 5XXX.0 MHz - 20.0 MHz - 1/16 - CC 19 - 2.5 ms - Other Regulatory/Other
FPGA Version : 080216
FPGA Features : AES, Sched, US/ETSI;
02/13/2017 : 17:00:56 CET : :t_ident(NTP02/13/2017 : 17:01:19 CET : :Board Temperature: 11 C / 51 F
02/13/2017 : 17:01:31 CET : Acquired sync pulse from Power Port

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Similar reboots happens on some PMP 450 but with a "normal" whatchdog reset... but seems happen more often on 450i with many users (80-110)

Someone have the same problem?

Could you please sent engineering.cgi logs from problematic radio to subi.s@cambiumnetworks.com