Same here.
1) It appears on the website, but not in the galaxy client.
2) Moreover, all history (time played etc.) got erased. But! I still can launch it via "Friends/Activity" tab, and it shows up there.
3)Important: the client freezes when I try to update it via "update" option in GOG galaxy.
4)And previously, the game used to freeze on first launch, so I always had to shut it down via windows 10 task manager, then re-launch it again.
5)Sometimes the Colorado Survival gear DLC didn't pop up when starting a new game (at random).
6)Uninstalling/reinstalling either Galaxy and/or Wasteland 3 doesn't help.

Yep same. This game has been bugged to me since launch, where i unintentionally broke it by pre-creating characters which crashed the game during an autosave, when i load back in i have ALL the characters in the party summing up to a good 8+ custom made characters... One was stuck below the ground...

Next up it breaks one of my "original two" chars by resetting a lvl 10 char into a 3 skillpoints, random attributes with a -7 attribute debt, which yes when levling up goes down to -6... woop...

Got stuck in snow with a char, had to kill her and revive...

Random crashing when adding 6th party member...

Now entire game gone from galaxy. Can see it in library on site, but cant even manually add it back into the galaxy client and no signs of it ever being there with it being gone from "recent activity" too.

I mean, i thought the dialogue bug in beta was bad but.......

Okay, I woke up and launched the Galaxy 2.0 client, and Wasteland 3 was there in both the "Owned Games" and the "Installed" sections.

I would say that as far as I am concerned, the issue is resolved. Props to CD Projekt Red for fixing the issue promptly!

What says everybody else? Is the issue solved for them?

Yep, same here. As you described it.