Because if it’s a bug with GDevelop then none of the regulars on this forum can help.
It’d also be good if you can test it by creating a new project with 2 identical objects (make one and then duplicate it) and then making one of them a global object. Then check whether the issue is present for the global object and not the scene object when the game is run.
If it happens, create a new thread with a meaningful title, like “Global objects bug”, clearly explain what the bug is (ChatGPT comes in handy here in revising paragraphs) and include/link your sample project.
[edit] I see you’ve created the bug thread. Now you need to fix the explanation (i.e. describe the issue in detail) and include the minimal sample project.