Thanks for testing and report it. I will try to reproduce it as you've explain.
I've never test it in such way but now is the time to do it.
I suspect it is my fault.
I use a temporary group (with the name Group-T) for all the selected furniture. After move it in the desire position I've ungrouping it.
Finally I grouping all furniture as Group-M.
Probably I need to find an other solution.
I'm open to any suggestions.
Anyway it need also some improvements and corrections in other parts.