MMU2S PLA+PVA attempts failing due to them not liking each other  

MMU2S PLA+PVA attempts failing due to them not liking each other

So I got MMU2S just to print with soluble support, I don't care about multi color stuff.

Spent a lot of hours trying to make it work, finally it seems to be working - I had to get rid of weird buffer thing which does nothing and so far I settled with putting spools as far as possible (about 1.5-2 m in my case) from the printer so retraction filament would hang in the air rather than make knots. Seems to be working. Also I had problem with IR sensor not detecting filament when it's a little bit thinner than 1.75, only way to solve this is to cut mangled filament every time this happens but I wish there was a version of chimney parts that would allow thinner filament detection by IR sensor.

However the unsolvable problem I am having is not related with MMU unit itself, but with the filament settings. I am trying to do a complicated test print using PLA and Prima PVA+ (I also tried Verbatim BVOH), it has filament change at every layer even though I am using soluble interface. The print seems to be doing fine for 30-40 minutes but the wipe block keeps turning into a collection of unconnected strings that ruin everything once they stick to the nozzle and get plastered all over the print. Cutting those strings does not help since it means wipe block gets printed on the air at one point and then it's screwed anyway.

So basically problem seems to be that PVA/BVOH does not connect with PLA .

So I guess it would be perfect if they were put in separate wipe blocks instead of one common block. Is this possible to achieve in PrusaSlicer?

Or maybe there's some other way to make this work.