Sorry but I find those to create issues. I have no solution to that as I have never had to use any extender in 2 decades (we use the router as a wap solution.)
There are other reasons for drops which I can't guess apply here. So little detail means any guess will be a bad one. Well, there is that extender so that's bad. Then we have the old SSID, WEP issues.
don't know if this is an ipad issue or wifi issue. it has to do with "face time" on my ipad and dropped connections.