After activate command the hidden components are not showing

[DR_6962550]

i working with an assembly in that assembly i activate one part to put a hole. in that process while active command on, i did hid some of the parts of assembly. after exiting the activate command the hidden commands are not showing whats wrong with that please help me i attached the image i cant unhide the parts

[KenFarley]

I have seen this behavior before, where components look like they are missing. Nothing I do will make them visible again. The only way I've found that brings them back is very unpleasant: I save everything, close the assembly, erase from session, then re-open the assembly. Fortunately it's a very sporadic thing, but still, pretty annoying.

[DR_6962550]

I have found a way to undid the components 

It's in the

model tree

Under the part name

Design items 

Body (again beside the arrow mark)

Body (hidden) unhide it it shows all of the items

[StephenW]

I don't know if this will work with this specific issue or not.

I go to layer tree, then right mouse anywhere within the layer tree and select "reset status".

[KenFarley]

Can't recall if I tried this, along with the many other things I did, but I'll give it a go next time I'm a victim of this behavior. It seems like the parts that are affected get "locked" into being invisible, regardless of their visibility. They can still be picked from the model tree, too.