There is already an update. I re-opened my sun game and i put all of my pokemon in my party...all of them healed besides Blastoise. I believe he was the first one with it so It'll be harder to cure him. All the others are cured just fine which will, hopefully, transfer over fine. And I checked pokemon home and gen five are in the pokemon home...including Samurott...so......
Edit- if they did accidentally false positive me then it should, hopefully, work now once their all transferred. I'll let you know if he moves over successfully or not.
Edit 2 - sorry i had forgotten to mention that when I checked the pokemon home database it shows gen 5 is able to transfer over and that I had a snivy and Tepig transfer over just fine from my pokemon game to pokemon home, so yes thats why I believe it was Pokerus because no other ones gave me a problem until I hit the boxes with pokemon that had Pokerus...which would have spread to all of my starters at some point after opening the game again. But its ok I was also freaking thinking I couldn't use my starters that I worked my butt off to really improve since I had my first gen game :)