wow, I've seen condensation on a lens of mine in an extreme situation, but it certainly went away when the lens finally acclimated to outdoor conditions. And I'm talking about taking a lens out of an air-conditioned home (probably a cool 72 degrees) and outside to 90s heat and humidity of a N Carolina beach.
It fogged big time. Want to say it took the lens about 20 minutes to acclimate to the change in conditions but it did eventually clear up both inside and out.
Hope your lens clears up. Kinda scary to be honest.
What has happened to the OP is not normal, imo. Just a month ago I was in Cuba, took camera/lens from air-conditioned room to pool area (can it get more humid than that), got into pool with the camera and took shots of my wife standing under a, good sized, man made waterfall. I noticed my 85/1.8 (same lens as OP) had fogged up badly, front and rear element, as did the mirror. Took about 20 minutes for all to clear along with some help from a microfiber cloth (just the lens, not the camera mirror). No condensation inside the lens, at all. If that would have happened, I am sure there would be "water marks" left behind, permanently.
It was over 90F at the time.