GUI.Frame(GUI.RectTransform(Vector2(x, y)), nil) doesn't work properly on ultrawidescreen resolutions

[Xerathe]

In game, it still considers me using standard 16:9 1440p when I try to Anchor a TextBlock to the BottomCenter - which makes the text appear to the left from the actual center.

I am using a 21:9 1440p monitor - 3440x1440.

Trying to tweak a mod/add-on for Real Sonar and they have a TextBlock that shows angle you aim a turret at:
local textBlock = GUI.TextBlock(GUI.RectTransform(Vector2(0.5, 0.045), frame.RectTransform, GUI.Anchor.BottomCenter), "Aiming at: 0°", Color(125, 255, 125, 255), nil, GUI.Alignment.Center)

GUI.Anchor.BottomCenter = text appears a long way to the left from the actual center
GUI.Anchor.BottomRight = text appears moderately to the right from the actual center

[Xerathe]

Update. It's not Anchor, it's GUI.Frame(GUI.RectTransform(Vector2(x, y)), nil). If in GUI.RectTransform(Vector2(x, y) x and y are 1 - the frame doesn't occupy the whole screen in 3440x1440. It leaves around a thousand pixels on a side. I had to modify 1 to 1.34375 for it to take the whole screen. So, there is a workaround, but it really should work as intended right away, shouldn't it?

[evilfactory]

I believe this is an upstream issue