Hey@Pat. 

May I know how about the Leds status when RE lose Internet, did all the network device lose connection, or only iPad? 

Here is a detailed troubleshooting guide for RE unstable issue, kindly give it a try and let us if it helps: 
https://community.tp-link.com/en/home/forum/topic/272398

Also confirm the RE650 V1 is the on the latest firmware :
https://www.tp-link.com/support/download/re650/v1/#Firmware

Hey@Pat. if the issue is only with iPad,  you could try to set a fixed IP address on iPad like below and see if that helps with stability, and you could also try to reach apple support and see they have more suggestions. 

WiFi settings -under IPV4 Address- Configure IP- change Automatic to ' Manual'

• IP address: set an IP within router's IP range
• Subnet :255.255.255.0
• Router: IP of router
• DNS:8.8.8.8

Hi @Pat. 

It's ok to restart the extender if that helps.  When there is no Internet, how about the LED status on Range extender ?

I suggested trying some suggestion steps mentioned in guide below, some of them are approved to be working by our users:

 [Troubleshooting] Range Extender Keeps Losing Connection

 https://community.tp-link.com/en/home/forum/topic/272398

If that does not help, can I know the steps you've tried and some information requested there thank you.  You click on ' reply ' on my thread directly, so the system will tag me, or I might not see your reply in time.