I logged here to see if anyone else is having the same issue and it seems that I am not the only one.
I have Pitch changer in the "first" block, actually noise gate is first but it is disabled/bypassed in both snapshots where wobbly noise happens. I use the pitch block for matching my guitar tuning to different songs and in the acoustic parts where reverb is enabled after pitch this wobbly noise is audible clearly, especially in open chords.
I have tested with different reverb blocks and they all produce the same wobbliness. It disappears when pitch block is disabled/bypassed.
Settings for pitch block are: position=100%, Heel&Toe=-1, Mix=100%, Level=0.0dB
