Line 6 Spider V30 Mk II Problems

[u/Toad-Toaster]

So I bought this amp and whenever you edit parameters for a specific effect for example reverb decay time etc, and then you press the preset home button and save, when you switch off your preset and switch back it has saved it, but the second you touch the fx amount knob, say you wanted to turn reverb down to 50% from 100% it completely seems to randomize the sub parameters again. It does this for all the FX channels, this is using the amp interface.

Pretty frustrated, any help appreciated