Can someone pls tell me why Canelita always out of the water?

All of the other snail are calm in the water, but canelita's always going high! I put some books so prevent them of escaping and hurt themselves, but canelita always chose to stay in the books I use as a lid of the tank, with her head down! Even if she's not in the lid, she's always searching for the highest place and she stays there, chilling

I don't think that has something to do with the water because all of the other snail love to be there, they don't even go higher than the level of the water! I also cleaned my tank yesterday, I clean it regularly and I also have oxigen and a filter, so I don't know whats happening! can someone pls tell me? why Canelita's always in the surface? My snail want to be a garden snail?