Objects not shown in sculpt mode Blender 2.80

I have a strange effect. In my blend files I have multipe objects. All objects have been sculpted in the past.

Now all are visible as objects, can be selected, textured etc. But in sculpt workspace only one object (the last I worked on) can be shown and changed.

Searching for any reason it became worse. Now the last object is not shown in sculpt mode as well.
I had the same issue. Above the 3D view port where the layout tabs are (layout shading animation... etc) just delete the sculpt tab where you have the problem and add a new sculpt tab with the + icon. Minor bug hopefully will be fixed