Hi,
this is is a known bug and should be fixed in a later update.
You have asked for a better reverb several times, but I am not sure, if this can be accomplished easily. Effects like delay and reverb need a certain amount of RAM inside the DSP unit and as far as I know, this RAM is quite limited in the Origin hardware.
So one solution could be to offer -one- really good reverb in -one- slot, but no reverb/delays in the other slots. I personally don't like this solution and prefer to be able to use all kind off effects in all slots. I actually don't use reverb very often, but I know that people have different taste.
So my guess is, that Arturia will try to improve the reverb algorithm at some point in the future, but I would not expect some Lexicon quality and I would not hold my breath until then. :-)
Just my 0,02 Euro
Frank