Building the patch from scratch was not the solution for my patches.
My problem is that I have patches where I switch from an acoustic snapshot to a modelling amp (for example US Double Nrm) using a Variax. To compensate the volume difference between these to snapshots I turn up the level in the Multi Output (+15dB) for the acoustic snapshot. This causes a quick decline and rise of the volume (amp off: decline, Multi-Output: rise). In previous versions this was not a problem, but in 2.80 it creates a nasty sound.
My solution for this problem is to create a Split A/B: Route to A with a gain block for the acoustic snapshot and Route to B: the modelling amp.
This works fine at home. I've to try it with the band.
This seems the work fine atn the Multi Output (+15dB) for the Acoustic snapshot