RBRE 960 Wifi clients constantly disconnect/reconnect throughout the day

sebgood  try these steps, it did help for me:

1. Disabling 20/40 MHz Coexistence provides far better performance with it off. 

Orbilogin.com -> sign in via admin ->ADVANCED tab -> Advanced section -> Wireless Settings -> under "Region Selection" -> Region: Advanced Wireless Setting (2.4 GHz b/g/n/ax) -> uncheck Enable 20/40 MHz Coexistence

2. Finding out the best MTU for your system and changing that setting.

Open Command Prompt as an admin. Open Start menu -> type CMD -> right click on Command prompt and select run as administrator.

In the command prompt type ping google.com -f -l 1500 (1500 is just to start)

If you get a message saying packet needs to be fragmented but DF set. 1, 2, 3, or even 4 times.  

Ping statistics for IP address (example Ping statistics for 175.335.80.91)

Packets: sent = 4, Received = 0, Lost = 4 (100% Loss) <- Here is where you can have different results 1 received and 3 loss. Basically, you're looking for 0% loss. Anything other than 0% loss means MTU is too high.

After you see 1500 is too high you will follow the same command ping google.com -f -l 1500 but, this time you will change 1500 to 1492 and run the command (hit Enter). You will continue lowering by 10 each time after, so you next ping would be ping google.com -f -l 1482 and so on.

Now in this example let's say I try ping google.com -f -l 1472 (again you might have a larger or small number here) and this is the message you get:

Pinging google.com [175.335.80.91] with 1350 bytes of data
Reply from 175.335.80.91: bytes=68 (sent 1350) time=7ms TTL=116
Reply from 175.335.80.91: bytes=68 (sent 1350) time=9ms TTL=116
Reply from 175.335.80.91: bytes=68 (sent 1350) time=9ms TTL=116
Reply from 175.335.80.91: bytes=68 (sent 1350) time=10ms TTL=116

Ping statistics for 175.335.80.91:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), <- This is the results you want.
Approximate round trip times in milli-seconds:
Minimum = 7ms, Maximum = 10ms, Average = 8ms

This means I got the right MTU.

In the Orbi router I will now set my MTU to 1472:

Orbilogin.com -> sign in via admin ->ADVANCED tab -> Setup Section -> Click on WAN Setup -> MTU Size -> add the 1472 here in the box and select Save.

3. Changing the Preamble Mode to Short Preamble helped with overlapping the wireless signals and helped with an my no internet issue. So, one of the problems I would have while being on the Wi-Fi, is just randomly losing internet. I would still be connected to the Wi-Fi but, none of the apps would load or sync. So, I updated the Preamble Mode and this helped. 

Orbilogin.com -> sign in via admin ->ADVANCED tab -> Advanced section -> Wireless Settings -> under "Region Selection" -> Region: Advanced Wireless Setting (2.4 GHz b/g/n/ax) -> Preamble Mode -> Automatic -> Short Preamble -> Region: Advanced Wireless Setting (5 GHz 802.11a/n/ac/ax/be) -> Preamble Mode -> Automatic -> Short Preamble.