Indexed caches with non-indexed entities query inconsistency

When a cache is indexed, but the protobuf entitiy is not:

"FROM Entity" returns zero results
"FROM Entity WHERE <predicate>" return results

It appears in the first case the query goes to the index (that will be empty), but not in the second where it does a non-indexed query

On a side note, if I configure a cache as indexed, but do not index any type in the protobuf, it returns ISPN014054: Trying to execute query from xyz, but no type is indexed on cache. This should be improved to mention the schema needs to be changed