Hmmm, my guess is its an openfl issue - ill have to confirm that a little later with a non haxeui project but if memory serves there is nothing special in haxeui-openfl that enables (or disables) that behavior, so my guess is its openfl - that said, there might be a way to workaround it, even temporarily in haxeui-openfl, but ill have to have a play.
Im not sure what you mean exactly about the cursor, do you mean its not the same height as the text? Thats also an openfl issue, text rendering in general has nothing to do with haxeui-openfl and there is fairly limited control it does have over it (same as any normal openfl lib basically).
Cheers,
Ian