Problem: on slow network connection site response comes randomly, if any. Errors like "bad request" or "site is unavailable" appears. It also happens before initial authentication, although it looks like worse after UID/Pwd are entered. With Chrome is even worse than with Safari. Site is behaving as usual while using a PC.
Configuration: standard iOS 8.1 up-to-date, >30GB memory available, no jailbroken. Experienced also with iPhone with 8.0x, no JB.
Network both shared wifi (limited bandwidth) or 3G/4G wireless via external router