Even though I've pulled a cat cable to do a direct connect I've been using wifi for 6 weeks without a single issue. Picture quality is excellent via Netflix, Amazon, etc. Would suggest checking your router settings or using a static ip.
There is no perfect display, quit looking for faults and enjoy
LG B7 OLED 65" (waiting for cal by DNice)
Ascend's with RAAL, Love my PSA v1800 and a 7.2.4 speaker config, Oppo 203 and other toys