RP-AC52 repeater dropping wifi

[bsod]

Can anyone help me try figure out why my phone (Nexus 5 running Android 6) occasionally disconnects from my repeater?

I am remotely logging and all I see when it happens in the log is:

Example:

LOG#6 bc:f3:ae:de:r8:28 has disassociated

dmesg via telnet gave the same message

 

[L&LD]

Are you roaming when it happens? What obstacles are between you and the repeater and at what distance?

Are you using the same ssid's between your main router and the repeater? Do you have any special characters (only use alpha numeric) in the ssid or password? Is the ssid hidden (if possible)?

Do you have the latest firmware and did you do a full factory default reset and afterwards a minimal and manual configuration to setup the repeater?

Does your phone ever disconnect in a similar fashion from the main router (what model and firmware are you running there)?

Are you holding it wrong?

 

[bsod]

Thanks! No, not roaming. It happens when I use both the same SSID or different ones. In fact to test if it was due to roaming I made separate SSIDs and forgot the router one on my phone. It still did it. It drops back to mobile data and 20 secs later connects back to the WiFi again.
I thought it could be a range thing but it happens both in the corner of the house (avg to poor signal strength) as in the bathroom next to the repeater (good signal strength). There appears to be no pattern to it. I have also tried in a 3d location inbetween both distances. Usually there is one wood door/drywall in the way and I'm sat about 20ft away. The other locations are 10-15ft away.
My network SSID contains only alphanumerics but SSID carries an uppercase letter. No the SSID isn't hidden, it is possible to though.

I am running the latest firmware and I've reset the device to factory settings (my main router too) to see if it fixes the problem. After the reset I let everything be on default settings apart from network name, password etc.

I was actually using the repeater for a while as an access point until one of my homeplugs broke. It did the same thing then too with my phone.

I am currently testing another phone to see if the same happens, I want to test on 2.4g on my phone too. I know for a fact it doesn't do it on my laptop the same way but I also have had lag on my laptop when browsing the net although it doesn't drop connection.

My main router is supplied by my ISP in the UK. It's a Sagemcom model plusnet hub one (same as BT home hub 5). It should be on the latest firmware as the ISP do updates automatically themselves. No my phone doesn't disconnect from the main router/ap like it does upstairs.

I was hoping logging and/or using telnet would give me more info as to why my phone is disconnecting but alas it just shows the message above. If I force restart my phone the repeater gives no message at all in the log so I'm sure something is happening somewhere causing it to happen.

Sent from my Nexus 5 using Tapatalk

 

[bsod]

I still haven't worked out what the problem is, only that it only happens with the 5ghz band. I use the same phone with 2.4ghz and its fine. It also seems like 5ghz is fine on my laptop only. With my phone it just disconnects a lot.