Solved ! After 2 weeks of trying. Messing around with positioning Deco devices one thing finally worked :) I have disabled high priority for Yamaha Musiccast devices and it works :) So, there is...

@David-TP tested...unforuntately the issue persist...I just realized that I forgot to mention that environment is mixed X20 and M5 devices...but still before replacing E4 with X20 there was no...

@David-TP Thank You for Your suggestion. For sure I'll try this and update with results but that's not real/comfortable solution. Yamaha musiccast devices are managed by Musiccast app on...

Hello, I've replaced my E4 Deco devices with X20...assuming they are better, newer, more reliable...Everything else got better but unfortunately my Yamaha WX-10, WX-30, RN-602 devices have issues...

Unfortunately problem occurs again. Honestly I'm lost how to troubleshoot :)

Hello @David-TP , Thanks for suggestion. Luckily issue solved itself after few days. I hope it won't come back. In the video I only tested ping on laptop but trying to access internet on iPhone or...