Hi,

It might've been just that you didn't belive that reality check will work and therefore it didn't.
Or subconsciousness made it fail since that was most logical result that were to happen?

Anyways to fix the issue i guess adding a bit Dream Control to reality check should do the job
Before attempting reality check tell yourself that it will work and be confident that it will
Be confident that you will be able to push fingers through your palm, and then do it.

That's how i do Reality Checks myself