can not cache with StageGL instance get "TypeError: Cannot create property 'width' on boolean" #1065

I tried to cache a container using stagegl insatance:

let newStage = new createjs.StageGL(document.createElement('canvas'), {antialias: true, transparent: true, autoPurge: -1});
myContainer.cache(0,0,100,100,1, {useGL: newStage});

But I got "TypeError: Cannot create property 'width' on boolean" error.
Look like EaselJS set "this.target.cacheCanvas = true;" but then get "width" property: