The bug can be reproduced with the redmew scenario, any scenario from this list should do: https://github.com/Refactorio/RedMew/re ... 26-06743fa
Here's a twitch clip showing the hover (made by TheOrangeAngle) https://clips.twitch.tv/EndearingFineBu ... RedBlaster
Here's a screenshot that I made, notice my mouse being on discord (second monitor, fullscreen game mode, also happens in windowed)
![Image](https://forums.factorio.com/images/ext/9c34565fc1e05d30b2ca036506ab5327.png)