So far I have submitted this bug to Mojang, and they have failed to acknowledge it.
I would like to see if any of you have a solution so far-

(Note: I have verified this with two of my friends, and my iPad.)

Upon joining a server (my server included but not specifically), players will almost immediately crash to their home screen, following a black screen. It will download the world, and will be able to locate the server. However, it only crashes when the loading process is complete. The server appears online, with the green marker indicating it is on.
(I cannot attach a screenshot, as it immediately crashes to the home screen when I load the servers.) The devices that I have tested this on are as follows:
iPhone 5s
iPhone 4
iPad Mini 2
iPad Air 2
iPod Touch 4
The iPhone 5s and iPad Air 2 were the only ones able to successfully connect before crashing.

NOTE- This affects my MCPE server, NOT my PC servers.