Hello all,
I'm seeing the "nav. bar" freeze and the "Drop downs locking" regularly!. I'm using MF4 with DL1608 and an Ipad Air running the latest OS., screen lock is definately disabled. I can't say what triggers it, but it usually occurs about 10 mins into sound check, when all sorts of things are being adjusted.
Also, last time out, half way through the evening, with hands well away from any controls, there was a sudden increase of gain somewhere in the aux o/p 3 mix, causing loud feedback. Now this could have been the monitor speaker (Behringer 205D), or the mixer. You can understand that in the panic to kill the noise, the exact cause was not spotted.
I have - of course - been unable to reproduce this!