I wanna say its the average or i should say pattern of ones travel history if its not been 5 years yet And if you became Pr in may 2017 and only stayed in canada until you got pr card and established no ties in canada for example didnt buy house car or job etc since then this indicates no intention to settle in canada
I found this link and it might be helpful in understanding this fact better ..its someone whose sponsorship app was rejected due to more than one factor and one being not being present in canada long enough or residing in home country more than in canada since becoming PR
https://www.canlii.org/en/ca/irb/doc/2011/2011canlii48092/2011canlii48092.html?autocompleteStr=Gao v &autocompletePos=1
Having said all this ... visiting your spouse and staying there waiting for decision isnt a good idea .. my personal thought
But again so many things matter ..one being which stage your application is at ...