I just bought a Breville Bambino Plus, and when I tried to hook the filter with the head it doesn't turn and lock. It seems too hard to the point I think I might break the filter.
I tried removing the ground coffee to make it less, then hook it again. I got the same result however, when I removed the basket from the filter it was able to turn and lock!
I was using the same tools provided with the machine.
I'm not sure if the reason is the basket or what though it was provided with the machine.