after restarting my zenfone, sync works, but it is still a problem as i know it will occur again

- wifi is on and both devices are on same network
- i restarted MMW several times

sometimes, after i stop it, restart etc.. it ends up working, and i have no clue why

​​Log ID: NF0N98JHLQ
Description: impossibles sync mmw

Hello

i recently bought an asus zenfone 2, and réinstalled MMA on it
i synced all my music, but since a few days, i get troubles with the sync (not always)

i'm using MMA 1.1.2.0415 and MMW beta 4.1.8.1747 RC

MMA doesnt see the MMW server at all, even though MMW is opened on my computer, like always
I try with the mediamonkey service on and off, but it doesn't change anything

what could be causing this ?