@kinkoosh Hi mate - so, i spoke with the EA team ... it is an issue that they are aware of, but from what they have been able to deduce it randomly occurs in ipads, but as it is random (both in terms of when it occurs and the devices that it occurs on) they have not been able to replicate it, and as such have difficulty trying to trouble shoot it.
Consensus within EA seems to be that it is likely device/ios related and there is not much that they can do from their end.
That said though, if it is happening regularly and can capture video of it occurring on a couple of occasions, send them through so that the dev team can have a look and see if anything jumps out at them.
Sorry - couldn't be of more assistance - the thing i was thinking of was a while ago and predominantly android related where audio would not come back after a call or an alert without restarting the device.