just another update after 2 years ago since i started the thread and report this Mudman G-9300 reset problem..

it has not reset it self nor i had to perform the AC reset since i put this watch on the drawer of my recording studio far from any cellphones, tablets or WIFI router..
i personally think the reset was caused by the interfere with several wireless/communication devices..
i'll update again someday if i experience any other anomalies..