Its like the guy in Post #10 ... if i put the CPE 210 v 1.1 on a extra powerline it works fine with 1-4 ms to the device, not the opposite site connected via wifi. To the device itself i got...

I now know whats happen. You use PoE Passthrough ! In this scenario this laggs happen to me too. I went back to a extra PoE Injector for my second device and the lags are gone. Seems a bug in...

Deactivate the maxstream feature will give you much better ping results

TP-Link ... is there a update about this issue ?

Wie sieht den der SNR aus ? Ich würde die Kanalbreite runterstellen dadurch wird die Bandbreite geringer und die Verbindung stabiler Nen Bild von der Statusseite könnte auch helfen

Nope this is the airOs from the old non AC devices ... Youre right that the previous software is nearly the same but not airOs 8 Like this one : The LBE-5AC-23 is at 50 dollar ... so we have to wait...