Scarlett Red Reef Hermit constantly on its back ?

[Felix T Cat]

I added a few scarlett red reef hermits to my tank 2 weeks ago and one keeps laying constantly on it's back. If I flip it over the first thing it does is reach out and flip back over ?.
It is staying in the same spot and at first I thought it had dies but then it went back into the shell...

Any ideas ?

 

[Jeff]

Most likely the shell it lives in is top heavy.

 

[Felix T Cat]

It's in the shell that it came in from the store and I have loaded a number of other shells into the tank around him just in case he wanted to switch.
I guess I will just keep an eye on him and see what happens.