I am using a Godot plugin, and its address is here: TileSetHelper - Godot Asset Library. I noticed that in its plugin, a scene has a scene group called “Sync_Button.” However, when I click the plugin’s sync button, this group appears in the group list of my selected TilemapLayer scene, which confuses me.
I think this is a question you should ask on the plugin’s github repo so you can know how the plugin creator intended it to work, but as for the group stuff, when the game runs there’s no difference between scene and global groups.
The same underlying logic is used for both Global and Scene groups. Groups with the same name are considered one and the same. This feature is purely organizational.