I am not sure what escalating it would do? There is no legal requirement for councillors to document their reasons for making a decision. If you look at the minutes of the district council, as an example, give a motion, and that it was resolved, there will be background papers, quotes etc that can be referred to, but there is no requirement (and it would not be proper for them to be included) in the minutes.
If, for example, Cllr Smith voted against a new park bench, there is no requirement, and it would be daft to require from them a full explanation of why they voted against buying a new bench.
All the background documentation should be in the agenda pack made available to all councillors the public.