Hello HaPe-CZ,

I don't quite understand why you change the platform ways from the train stations Saint-André-les-Alpes (https://osm.org/way/395252564) and Entrevaux (https://osm.org/way/396734929) into a multipolygon.
First of all, the platform ways are used into several train route relations and therefore we do have now some inconsistencies. The former platform ways with the role platform are no platforms anymore (just an outer way from a multipolygon).
And secondly, I doubt, that the shelters which are now used as inner ways for the new created multipolygons are not onto these platforms. What is the problem to have a shelter onto a train platform? In my humble opinion it is not necessary to create a multipolygon in that case. There all kinds of objects onto train platforms (bin, bench, etc…) and a shelter is one possibility. In this case the shelter is still a part of the platform. With your changes, it suggests that these shelters are not a part of the platforms anymore.

Best regards,

Patchi.