Bees In My Bird Box?

Hello Everyone,

I have some bees which have taken up residence in one of my Bird boxes, they aren't bumble bees, the identification app says they are Red Mason Bees, although it's hard to get a good photo of them to be honest.  

I have no problem with them being there, in fact I've went out and purchased a couple of bee homes for the solitary bees, as I've never thought about it until now! I do have a couple of questions though. Aren't Red Mason bees meant to be solitary? I've definitely noticed at least three in there at the same time, so are they making there own little nests individually? I was thinking of moving the box next year to a different location, is that ok to do and when could I do that if possible? I don't want to disturb the bees!

Many thanks!