As Title says, I was in a Pub Duviri Solo Exp, and had just entered the Undercroft portion when the Host decided to stay in place and die to enemy fire and promptly quit. I was with Titania while in Razorwing when it happened, and after the migration, my FOV was all zoomed up, and after a few seconds of playing I realized that she was also tiny, as in Razorwing-size tiny, but I could use my base weapons like normal. I was not in Razorwing when host migration finished. Re-entering Razorwing sort of visually bugged Titania. See screenshots below:
Thankfully, it's just a visual bug. Other than parts of Titania being invisible in flight, the ridiculous zoom, everything still functioned: Dex Pixia shoots, Diwata can attack, abilities can be cast, and I can Transference.
Me and the remaining squadmates were still able to complete the 6 missions, beat the Orowyrm, and safely extract.