Oxford Bee Company nest in use

I’ve had an Oxford Bee Company mason bee nest in the garden for a couple of years now. This year it’s been used for the first time though. Strangely enough it’s been used by leaf cutting bees (Megachile sp.) rather than the mason bees though:

Used tube in bee nest

The leaf cutting bees and mason bees still prefer the bamboo canes in the other insect nest habitat I have though.