Haxe: Build macro doesn't find namespaced metadata

display.hxml

--display Main.hx@0@position

interp.hxml

-main Main
--interp

Macro.hx

#if macro
import haxe.macro.Context;
import haxe.macro.Expr.Field;

using StringTools;

class Macro {
	static macro function checkMeta():Null<Array<Field>> {
		warnIfNotFound(":myMeta");
		return null;
	}

	static macro function checkNsMeta():Null<Array<Field>> {
		warnIfNotFound(":myMeta.x");
		return null;
	}

	static function warnIfNotFound(metaName:String) {
		final localClass = Context.getLocalClass().get();
		final className = localClass.name;
		final metaExists = localClass.meta.has(metaName);
		final mode = #if display " display  " #else "!display  " #end;

		Sys.println(mode + '[$className]'.rpad(" ", 22) + '@$metaName'.rpad(" ", 11) + '=> $metaExists');

		if (!metaExists) {
			Context.warning('$mode [$className] Metadata not found: @$metaName', Context.currentPos());
		}
	}
}
#end

Main.hx

class Main {
	static function main() {}
}

// 1. build -> meta ---------------------------------------
@:build(Macro.checkMeta()) // ok
@:myMeta
class _1_BuildMeta {}

// 2. meta -> build ---------------------------------------
@:myMeta
@:build(Macro.checkMeta()) // ok
class _2_MetaBuild {}

// 3. autoBuild -> meta -----------------------------------
@:autoBuild(Macro.checkMeta()) // ok
interface IAutoBuildMeta {}

@:myMeta
class _3_AutoBuildMeta implements IAutoBuildMeta {}

// 4. build -> namespaced meta ----------------------------
@:build(Macro.checkNsMeta()) // not recognized
@:myMeta.x
class _4_BuildNsMeta {}

// 5. namespaced meta -> build ----------------------------
@:myMeta.x
@:build(Macro.checkNsMeta()) // cannot find metadata
class _5_NsMetaBuild {}

// 6. autoBuild -> namespaced meta ------------------------
@:autoBuild(Macro.checkNsMeta()) // cannot find metadata
interface IAutoBuildNsMeta {}

@:myMeta.x
class _6_AutoBuildNsMeta implements IAutoBuildNsMeta {}