Now running build 1.3.0, and I still got the exact same problems as described before when running 1.2.8. My system was very stable with 1.2.4. 

The problems have been going on for so long that I’m considering giving up and buying a different system. 

Which build on 1.3.0?

I almost gave up too till I used the beta . Now all problems solved

Best u email tech support to get the latest for ur device

I created a new thread for 1.3.0 build 36613 which is BETA (not the crap updated officially via the main app which is 707x) 

Hello SveinM. How does this firmware work? Do you have any problem?

https://community.tp-link.com/en/home/forum/topic/162088?page=1&t=2019%2F06%2F12%2002%3A22%3A40%20%2B0000

Use this

Hello Kevin, for when it is planned that we have the firmware 1.3.0 Build 20190419 Rel70702 in a few decos (4) M5 hardware V2, the official update to:

Hardware Version: V2Firmware Version: 1.3.0 Build 20190529 Rel36613.

With the days I have observed some deficiency, especially slowness. But I do not mind waiting for the supposed official update. I do not have computer attitudes and I prefer to have it done.Thank you.

Kevin. I mean, the ones we have with V2 hardware installed the firmware version 1.3 Build 20190419Rel.70702. There is already a forecast of official update to the firmware version: 1.3.0 Build 20190529 Rel36613.