装载器设置填充模式时bug

Laya项目，fgui最新版2021.2.1，在普通组件里放置一个装载器，装载器里放置一张图片，设置装载器的填充模式为“无”以外的任何一种模式，谷歌调试显示这个组件的时候，无法看到图片，如果此时装载里不放置图片，会报错
 
Uncaught Error: asBitmap no size!
    at Context.set asBitmap [as asBitmap] (laya.core.js:9028)
    at RenderSprite._canvas_repaint (laya.core.js:12509)
    at RenderSprite._canvas (laya.core.js:12469)
    at RenderSprite._initRenderFun [as _fun] (laya.core.js:12305)
    at MovieClip.render (laya.core.js:14415)
    at RenderSprite.transform_drawNodes [as _fun] (laya.core.js:12203)
    at Sprite.render (laya.core.js:14415)
    at RenderSprite.transform_drawNodes [as _fun] (laya.core.js:12203)
    at Sprite.render (laya.core.js:14415)
    at RenderSprite.transform_drawNodes [as _fun] (laya.core.js:12203)