Traktor BPM detection

New to traktor and im wondering why every time i close traktor and open it back up i have to reanalyze the tracks again ? i had them all analyzed with the bpms last night, then i closed traktor and now there is no bpm reading in my browser , is there a save button in traktor or what, haha i know you dont have to do this everytime you open up traktor

Do you have to reanalyze like wait for it to go through the whole track again? or is it just not showing in browser?

For me, it doesn't show up in browser a lot of times, but it will still have the track analyzed and it will instant load tracks + bpm and all that... I am kind of curious why