No problems...i have the same on low sr...even with sync 32 and no buffers...
by pluto you sould use 2.5bandwidth,no higher...dont work with higher bandwidth.
the lower sr i have decoded is 66
Before always problems with decoding...yesterday i have changed the usb cable and take one with 2 ferits and see...the pluto works very good now....strange!!!
try it and hopely results