I've seen this before and from this forum the only answer I remember is to shut off (completely - reboot) the iPads. For some unknow reason, this seems to make things better for a while. At work, it is now a routine daily task to shut off all iPads and reboot them.
I had checked through my technet mailbox, but totally missed that conversation; sorry for the extra noise. I have passed the restart advice on to my client.
Thanks so much!
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