I have a Linksys E4200v2 with the same problem. Can you share your result after the factory reset ?
I'm getting the same thing (WiFi dropping after a few minutes being asleep/locked), but on multiple routers. A couple of Netgear routers, a Motorola NVG510 ATT Uverse router, and a Linksys. I haven't had a chance to test it against our enterprise system at work, but I'll let you know.
Do we think this is just a software issue? Or should I be looking to start a case with Apple to troubleshoot for bad hardware. I've reset my network settings, but I haven't done the full restore yet. Though, doesn't seem like that is helping anyways.
So i'm in my office today and my iPad Air 2 works without a problem on my office router which is a D-Link DIR-855L. I had it in sleep mode for over an hour while I was having lunch, no issue at all on wake up. Wifi speeds are fine, no issues. My home router is a Linksys EA4500 and as of last night was still giving me issues. I know not everyone has Linksys routers that's having issues, but something still seems really odd about that. I'm going to hook up an older Asus router I have here to my home network, hopefully tonight. Curious if that makes a difference.
I think I got my issues resolved by setting the router (Linksys E4200v2) fixed to channel 1 (instead of automatic channel selection). 3 hours without disconnect after lockscreen now.
Right, start with the router settings website. Choose "wireless", then click "edit" for your 2,4GHz network. There is the channel setting, just select "1-2.412GHz" instead of "auto". Thats it for the E4200v2 with latest firmware, could be a bit different for other models. Just try it, maybe it's a temporary fix. My 5GHz network is disabled in general.
So i'm in my office today and my iPad Air 2 works without a problem on my office router which is a D-Link DIR-855L. I had it in sleep mode for over an hour while I was having lunch, no issue at all on wake up. Wifi speeds are fine, no issues. My home router is a Linksys EA4500 and as of last night was still giving me issues. I know not everyone has Linksys routers that's having issues, but something still seems really odd about that. I'm going to hook up an older Asus router I have here to my home network, hopefully tonight. Curious if that makes a difference.
Thanks for posting. I also have Linksys EA4500 which has been giving me endless issues. Looks like there's definitely an issue with this particular brand. Going to buy an Asus!