What has happened with the playhead?

Suddenly the playhead starts reversing by itself and I can stop it any other way than to restart Wavelab completely. This happenes time after time. Very irritating. Please. Need help with this. / Fransmo

macbookpro 2,8 GHz/ i7 /16 Gb OS 10.14.5

Key stuck on keyboard? - this happened to me.
Best of luck!~