People spawning outside (on south border) of map, yes, I've seen it happening since my debut, three years ago, but not as often as on the last couple days.
About invisibility, I may be wrong, but I believe it is related to some new sort of LAG... server's problem...
Edit: And answering your "question", Zup, I play on Android and never went unvisible - at least, never saw anyone complaining about it. I play on Android only.
If it helps, some weeks ago I played some games when I saw all the action, but my bullets didnt hurt anyone, and no one brought me down. My bombs didnt work. My chat didnt work. I read all the things people were chating, but I couldnt chat. Then, after shooting (blanks) some reds and (not) bombing two hangars, I quit.
It happened in three or four games, about eight or ten days ago. But never more...
Edit 2: Thats one of the many reasons I never use Apple devices. Apple realy thinks that the rest of the world need to fit its standard. Ridiculous. My younger brother had an iPod, and said he would never buy another one again. He once had an iPhone, and after seeing my poor old Galaxy S2 (three years ago), he abandoned iPhones and became a happy Android user - and he is a 150 I.Q. nerd! And now he only uses his macbook to work on graphic design. When he wants to play, he uses his PC...
Zup, I am sorry for you, but you are suffering under Apple's dictatorship.