Hi there,
Thanks for updating the thread! It might be specific to the unit or its current setup. If you haven’t already done so, you can check with other sites and if it does the same then it is definitely an issue outside of X.
Is your computer screen a touch screen? If not it may be something similar in wich some options are activated for it that makes the computer behave slightly different.
Or it could be a third party app or browser plugin that was installed. As checked on our end, though, the effect isn’t present so it should effect your viewers.
If you ever find the reason behind it, please do share so others who may have the issue can also check.
Thanks and have a great day!