Rekord box 5.6.1

Good Day

I am looking for assistance regarding the newly loaded rekordbox 5.6.1

Whilst mixing for approximately 45 minutes  I have noticed that some tracks whilst playing goes into something similar to a loop mode -example the track will start at the beginning and about a minute into the song it starts again from the beginning but the needle search section does no jump to the beginning of the song. maybe I have some setting I need to adjust, not sure if anyone has experienced this - it only started doing this with Rekordbox 5.6.1 and not the previous version of Rekordbox

Thanking you in advance