Had to roll back to 7.2 as can't trust 7.3 have Adobe committed to any action to reslove erratic behaviour of this update? Crashing, slow develop module behaviour, odd sorting, copy and paste settings erratic behaviour particularly with crops, Panels keep regenerating and loosing info when adding IPTC info..Also issues that I still have with Windows 10 but not MAC... still can't scroll down develop panels without moving to very specific area to side of sliders or consistently use arrow keys to navigate film strip without clicking back onto film strip casuing massively inneficient workflow. Also why do I have to use Shift Ctrl C to copy rather than ctrl c it's really irritating to have to cover two keys with little finger of left hand all the time.
Try installing LR 7.3.1 from the apps tab in Creative Cloud.
Thanks for the heads up will give it a go. People have been complaining about the navigation issues in develop using PC for years so won't hold my breath. Be nice not to have to go straight back to MAC.