You should check https://gitea.wildfiregames.com/0ad/0ad/wiki/BasicAnimationImplementation
and https://gitea.wildfiregames.com/0ad/0ad/wiki/Basic3DImplementation
depending on how technical you are.
Do you have prefered means of communication ?
I came across these things the last couple of days.
Some error while playing, but nothing bad happened:
The lower description can't be read because of the drop-down menu, and when hovering over selected map, the lower description given is from other two maps:
video(1) (online-video-cutter.com).mp4
It says "Unlocked in City Phase" when I'm in City Phase already, the requirement is instead the tech being researched:
Pikes seem to go through stone walls (Philip's reforms were good, but chill a bit):
Forgot this one, there should be more space available in the lower description: