Hello, and welcome to OpenStreetMap!

If you're new to contributing, please make sure to read the wiki if you are unsure about anything. It contains a beginner's guide, as well as detailed information on all common map elements and standards.
https://wiki.openstreetmap.org/wiki/Beginners%27_guide

In Montreal we use an offset of 0.6, -1.54 for the 2020 Bing imagery that is the default in iD editor. If you draw or realign elements, please change your offset to this value in iD by going into the Background Settings (shortcut: B key) and scrolling to the bottom to find Imagery Offset.
https://wiki.openstreetmap.org/wiki/Montr%C3%A9al

Could you provide your source for the changes to this "playground?" It appears to be a skate park on aerial imagery, and it seems that it was correctly tagged already. Is the name official?

Thanks for contributing!