I have loaded MeldaProductions MDynamicsMB on a track and automated the 'Active Preset' parameter. That changes the Active Preset (the list on the left-hand side).
At some envelope levels the selected preset continuously jumps between two, even when Reaper's transport is not playing. I cannot reproduce the problem in other hosts.
Attached is a small project showing the problem. If you change the track Automation mode to 'Trim/Read' you'll see that the problem value is 0.1128.