Yeah i have the same issues

it's not just the vanish plugin.....
even on a 20gb optical network to the server, i'm seing shit dissapear from different view angles.
Already filed a bug with FP.. also stuff moving about in the inventory, sometimes shows another item... but then later reverts
or it goes in , but is not there... but turns up later...

It's basically the level I would expect from an FP  update.... I think maybe  Q.A is something FP expects the players to do....

I have such a problem as soon as I turn on VANISH I have everything gone and the players and buildings how to fix it

Gotta wait on a patch to the plugin. It's already been reported in the thread below.

as with every time fp releases an update, both oxide and plugins need to patch to accomidate the changes. This is a known issue (real the other recent forum posts) since the fp update. Give it time for the plugin manager to release a proper offical fix.

Botspawn bots and Bradley also vanish.

I cant see players or bases an graphics dont even render in it.

I think the recent rust update broke the plugin.

After the update when moving through the map vanished, all entities are vanished. not just the player. Every single entity is vanished. There's no loot, no npcs, not even keycard doors are visible. no sam sites. not even my torch's light is visible. Toggling vanish off makes everything fine.

I'm having the same problem

Hoping for a fix today

It's broken because entities that have limited networking are put into a networking group called "limbo", in Vanish you'll only see entities that are in the limbo network group (entities that have limited networking). 

The only way to fix this is to add a patch with Harmony or something OR by going back to using a hook "CanNetworkTo" which results in performance loss.