Issue With Back and forth change of location

I have crated a project with two Locations and in each location
1. Have used a simple cube for floor
2. Have added a button to jump into other location
3. created the signal of the button
4. in logic editor i have used button, if and change location node
5. Button is click if its true change location triggers
6. Change location, external location is used and the link to my vrml file that is put on local server is given
7. For Main location link to location 2 is given and for location 2 link to main locations vrml is given

I started the main location vrml file and clicked the button it jumped to location2 and same way in location2 clicked the button and I came back to main location.

When coming back to same location the floor disappeared and if i go again to location2 the floor is also gone from there.

Simply the changing of location works once going back and again going to second location foor just disappears.