Cloud mask disappearing in Graph Builder

I’m working with lots of S-2 L2A products in SNAP desktop.
I’m trying to mask the cloud using “scl” layers from Sen2Cor and the layers from the original L1C file (“cirrus_clouds_10m” and “opaque_clouds_10m”), but I can’t figure it out how to procede.
I tried to use either land-sea-mask and band maths but when I’m using the window for a single process everything work fine, if I use the same function in the graph builder, since I want to do a batch process, some masks (frequently “cirrus_clouds_10m” and “opaque_clouds_10m”) disappear from the bands choices.
Why?! and how can I work around this problem?