There are some scoring rules in baseball that are stupid. There should be somewhere for mental errors. Son has not given up a run this year and had a ball pop up in the bermuda triangle last week. Right between second, CF, and RF. All three stood there and watched it fall. They literally were 5 feet apart and no one tried for it. Easy fly ball. It was a hit. Brought in another pitcher and let it score so first hit and first Earned run. Should be able to say easily catchable ball but everyone goes by the rule if it does not touch a glove it is a hit.
In your situation, I say mental error on SS but can't put it.