Font scale + rotation leads to wrong rotation degree

[Dador]

In libjass:

In Aegisub (libass):

Test script:

[Script Info]
Title: 
ScriptType: v4.00+
WrapStyle: 0
PlayResX: 1280
PlayResY: 720
Scroll Position: 0
Active Line: 0
Video Zoom Percent: 1
ScaledBorderAndShadow: yes

[V4+ Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
Style: Default,Trebuchet MS,54,&H00FFFFFF,&H000000FF,&H00020713,&H00000000,-1,0,0,0,100,100,0,0,1,2.55,0,2,0,0,42,1

[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.00,0:10:00.00,Default,,0,0,0,,{\fs50\frz22.962\fscx180\pos(812.95,394)}1111111111111111111111111111111111
Dialogue: 0,0:00:00.00,0:10:00.00,Default,,0,0,0,,{\fs50\frz22.962\pos(812.95,394)}2222222222222222222222222222222222222