Upon target selection, the TargetHealth bar appears at its normal vertical spot for a split second before flipping horizontal when rotation is set. No promises, but I can take a look at it if you let me know what in your repo affects the rotation.

The horizontal bar stuff is a giant hack using the animation system. I would prefer to just kill it since there are a dozen horizontal unitframe mods out there, but enough people use it that I can't.

This is where the rotation is handled for all frames.