Nope, just happened to me last night. I have a Minmus base with plenty of hab time and supplies and about 20 Kerbals there, but its a complete lag fest. I think its a mixture of using MKS and K&K base parts, and especially the "transparent pods" feature (which can lag you even if turned off). I don't have any mods that mess with Kerbals other than the contract configurator for tourism (maybe?). So I decide to scrap the base by bringing back kerbals on a space available basis from other missions that pass by...once empty I'll try again without the craziness.
I land and suddenly one of them is freaking out and made himself into a tourist...ok, he gets on the ship first, and I load up 3 other random ones. Those 3 were fine when I put them on board. After reaching low Minmus orbit, all 4 had become tourists...and stayed tourists all the way home...and are still tourists. Not the most useful report because I can't pinpoint the exact moment I noticed they were all 4 tourists, but I can say that I just started playing again 2 weeks ago and never used USI or MKS before that.
3 of us in the last few hours or so...just thinking the only thing I updated was Wild Blue Tools recently. Probably a coincidence, as I have no idea how that would give my kerbals bad touches, but its all I got for now.