We have several USB inputs which are used every week for a church service but over the last couple of weeks all the USB inputs have failed to load from the preset. This is too camera inputs and the output of the audio interface. The NDI camera presets are not affected.I tried going back a few weeks to see if the problem is just recent but the problem is still there. They all will load having opened the preset but claims they are all offline on opening the preset. The presets have given no problems and worked for months and I don't know what has changed to cause the problem. Any suggestions would be most appreciated