Retromod LoFreq Classic - Clicking on release when Mono switch is enabled

[noiseprovesnothing]

I took the plunge and bought all 5 of the Retromod instruments yesterday. I'm noticing an annoying click on release with some patches - I initially found this with Retromod LoFreq Classic - it's really obvious with patch SEM Bass 07. Load the patch, turn on Mono, and play some notes. Now turn off Mono - it's fairly easy to hear the difference.

I suspect this isn't desired/expected behavior.

Thanks,

Ken