I have a vinyl liner and went to clean behind my light. I suspected mustard algae was hiding back there so I removed it and vacuumed a ton of stuff out. The light was attached with metal screws to a plate in the wall. The liner was cut out around this hole. While I was cleaning I noticed the liner started getting wrinkled and floating! I quickly put the light back in but now there are sagging areas all around the pool - especially in the corners. I can tell there is water behind the liner.

Should I be concerned? Is there anything I can do to "fix" it? Was this a wrong way to clean behind the light? I'm hoping the water will just drain out eventually.