I installed a switch to power off the Unipulse (from the power rail of the Minipops 7 to a switch and the to the VIN+ cable). So when I power up my Minipops 7 with the Unipulse on I have to switch the Unipulse off and then switch it on again. Like a reset. After that it works perfect like it should. Maybe that helps for your KR-55B too.