This also happens with NVIDIA drivers. I'm on Vivid fully updated and using the 340 series drivers.
I tried using the SumatraPDF and tooltips don't dissapear completely and in my case they also flash. However if I select text in the opened .pdf or move my cursor over link in the webbrowser or this comment field the tooltips dissapear so in my case it isn't permament.
This also happens with NVIDIA drivers. I'm on Vivid fully updated and using the 340 series drivers.
I tried using the SumatraPDF and tooltips don't dissapear completely and in my case they also flash. However if I select text in the opened .pdf or move my cursor over link in the webbrowser or this comment field the tooltips dissapear so in my case it isn't permament.