so i finished dead money and decided to go finish crazy crazy crazy and i went to go repair the robot to find out that its not there anymore?! the desk its usually on is missing too..anyone else have this issue?

Hi,
sounds like u already started the mission, so if you wish to peacefully resolve the situation with Tabitha, ensure that you do not let a significant amount of in-game time pass between the moment when you first encounter Rhonda and the moment when you decide to repair her.
It is highly likely that Rhonda will disappear from your game if you leave her room and decide to come back at a much later time... :vaultboy:

i only flagged it :/ never went up the mountain though

Yep, but you already accepted the Mission (it′s in your PIP BOy, Right?)
And by doing so, there is sadly a chance that Rhonda still vanish from your game,
wheter you went up the Mountain or not.
:vaultboy:

oh wow thats really fail...guess ill do all my missions right away in future replays :/ thanks

I always would recommend To Do the Missions from start to finish.
I know it makes the gameplay more straight (linear), but like we all know.....
People having Quest Bugs and Quest′s getting BROKEN on the way....
So i think ist′s annoying enough to Re-roll 2-4h, but if you doing a little progress
in different quest′s and then something WONKY happens to a specific Mission you
maybe loose 10-30h.
And that′s the point when you about to say : YEAH BABY, WE HAVE A TRADE-IN CANDIDATE .
I am Done with the Game.
:vaultboy: