Issues with post 3.0.0.4.386.43129 versions (RT-AC68U)

[difference]

Have had issues with slow speeds last week. Realised that I upgraded my router sw around that time.
I only got 150-220 Mbps out of my 600 that I normally max out.
I found out that sw versions post 3.0.0.4.386.43129 is where the trouble started. Just rolled back to 3.0.0.4.386.43129 and get full speed again.
ISP: Tele 2 fiber (former Comhem) Sweden

 

[bbunge]

Have had issues with slow speeds last week. Realised that I upgraded my router sw around that time.
I only got 150-220 Mbps out of my 600 that I normally max out.
I found out that sw versions post 3.0.0.4.386.43129 is where the trouble started. Just rolled back to 3.0.0.4.386.43129 and get full speed again.
ISP: Tele 2 fiber (former Comhem) Sweden

That is too bad. But, which router?

 

[difference]

That is too bad. But, which router?

Ah, sorry. Just edited the Subject to include RT-AC68U.

 

[BobD]

Upgrade again, factory reset, and then MANUALLY enter the configuration.
Do not re-use any saved configuration files.
Google ASUS web site for how to factory reset your router.

 

[difference]

Upgrade again, factory reset, and then MANUALLY enter the configuration.
Do not re-use any saved configuration files.
Google ASUS web site for how to factory reset your router.

Already tried that. Didn't make any difference unfortunately.