I feel like this issue has been around for quite some time, and I have seen one other post about it on the other forums so far. It’s exactly as the title says. I enable the option Allow Toggle Conflicts (It allows users to set the same hotkey for abilities that work like a toggle) but it still doesn’t allow me to set the same hotkey for the Protoss Observer’s ability. Warp Prism works absolutely fine though.
From a programming point of view I can kind of see why this issue occurs though.