[MP2]

I have found the problem. It's caused by

TogglePlayerSpectating(playerid, false);

Please fix this.

EDIT:

I changed

TogglePlayerSpectating(playerid, false);

to

SpawnPlayer(playerid);

and it happened again.

EDIT:

Here's a GM to replicate it: http://pastebin.com/3nMMFgnV

The logincam code is based on the grand larceny GM.

Here's an alternative code, using a timer instead of dialogs, which rules out dialogs being the cause: http://pastebin.com/9D5ntxtA