Hey, thanks for reaching out! I am working on behalf of OPENER, the project that developed the App that initially made this change. 
Due to a bug, the App set the tags "platform_lift=no;platform_lift:portable=yes" when the user selected that there is no platform lift. 
This was wrong, and I am going around and fixing all wrong tags the app has set since the update was released. 

So yeah, I have no local knowledge of the platform, I only set the tags according to what the (deleted) user answered. 

Also note that a platform may very well be wheelchair=yes if there is no platform lift. The "platform" in platform_lift refers to the kind of wheelchair lift, not to the public transport platform. There are articles on the wiki that I wrote that should clear up any confusion. 🙂

Best,
Wieland (on behalf of OPENER)