@Heidi_Alp Thanks for your advice. This morning I noticed there is an old post discussing about iCloud backup may impact wifi performance. Thus I turned off the iCloud sync on MacBook, and also...

I have my macbook and iphone both connected on the same deco m9 via 5G channel but the ping response time on these two devices are very different. The ping response time on iphone is stable whereas...

@David-TP Yes I got email from TP-link. If you need a debug log, maybe I can help. Regards.

@David-TP Test configuration: Deco M9+ runs in AP mode Use my MBP (connected to master deco via 5G channel) to ping the machines: the first deco (master) the second deco router iPad Wifi off, BT off...

@David-TP Hi there, With more experiments, I found the ping spikes are caused by the BT on my iPad air. As long as I switch iPad BT on, the spikes appeared; once I switch iPad BT off, the spikes...

@David-TP My gaming device is contected via Wifi. I cannot reproduce this issue right now; I will try your suggestion once it happens again, thanks a lot.