Picture display problem

[ZCHUANGJie]

When the picture in the loaded rich text is too long (more than 5000 in length), it will not be displayed. When the length is reduced to less than 4000, it can be displayed, but there are new problems. Once the slide occurs, the picture will not be displayed, and when the slide stops, it will be displayed again. This problem will happen again when the long picture is reduced to about 1000.
当加载的富文本中的图片太长时（长度超过5000）时显示不出来。当主动缩小长度至4000以下时可以显示，但是出现新的问题，一旦发生滑动时图片就显示不出来，停止滑动就又显示出来。此问题再图片长图缩小到1000左右还会发生。

[erickok]

Feel free to let us know if this is still an issue in the latest on master branch.