I’m sorry, I don’t know really what causes to trigger this bug on certain gameobjects but it happens on few. They are always the same ones and once gameobject gets this bug, it happens 100% of time. If support is able to pull projects from accounts then you can open “Bomberman” project, it’s in the cloud (game scene, try to rename for example DummyAI). If not, I can email you with a link to the project.
On hierarchy window some gameobjects don’t want get name changed. Same happens with F2 hotkey or right click → rename. When you select an object at hierarchy, the name plate normally gets blue. When you try to rename it, it will change into rename state and instantly turn gray (removing the blue background, its like you click with mouse somewhere else to deselect it).
Selecting gameobject and changing name at Inspector window works just fine.