Na experience ko yung setup reset sa MXQ when I switch OS between stock and LibreELEC. Sa akin naman, ina-adjust ko screen size kasi lagpas yung notification bar sa TV display ko. When I boot LibreELEC via SD, then boot back into MXQ OS, nawawala yung screen resizing ko. I need to resize it again. Pero when I stopped using LibreELEC via SD, all my settings are retained ok. Never had any issues with clock nor LAN connectivity with my MXQ.
Ibalik mo na nga yan, at baka lemon unit. Take a video of the problems as proof. Baka pahirapan ka nang Lazada sa return, kung i-test nila ang nag boot naman. You need to explain the defects pa.