My Note2 did this and my current Note3 does this also...I don't consider myself a power user by any means....just a busy person who needs to keep up with news in my industry and open links to websites so I can come back to them later...I think my Note3 has 3GB of ram, maybe this really does make a difference over the iPhone only having 1GB?
Also op what android device are you using with that many tabs? Also how does it handle? I've been wondering how android handles multiple tabs but I can't find much on it, sorry for being slightly off topic but I'm very curious.