Never saw any such rule to ignore changes. Also makes no sense, the manufacturer provides a method how to calculate what needs to be found. Not a cookbook how to bend the input data.
What the operator writes in their manual are different RoE.
There are some embedded allowances and getting picky about 0.25 hPa is unnecessary. Namely so as there are several Pandora's boxes - who supplies the operator with obstacle data and how often those are updated is an example one not in a plain sight.
A severe practical problem lies where to draw the line how much of wrong is acceptable. Now and then something leaks that sounds rather silly, and while you can appreciate the effort there cannot be any points for trying.
Happy new year, safe skies and jolly arrivals!