XDJ-RX2 Sliploop + Error mounting usb drive

Got my RX2 a couple of days ago..going to use it, traveling and playing at places that don't have their own gear. I prefer the nexus 2 series but travel by train or bus with those is a pain in the b.

When i got the rx 2 it worked fine i think it was firmware 1.33 installed.. ran it for a couple of hours and no problem what so ever.. Updated to the latest firmware 1.37.. First that happed was that mounting time on my 256GB drive was loooong and often ended up with a error.. No problems in my xdj-1000 or the nexus2 players.

Used the RX2 for the first time tonigt.. This strange thing happend 3-4 times.
When using slip loop and released the button the player jumps back to about 45 seconds in to the track.. Really annoying.. or the track continues playing from the end of the loop just as when you release an ordinary loop but not in quantized.. out of beat. This must be a firmware glitch in v.1.37 it did not behave that way before updating. Please fix