Image become black sometimes but it's alpha is correct

Hi guys

I met a very difficult problem, this problem has been bothering me for more than a month

My game sometimes has a part of the image rendering can not come out, but its alpha channel rendering is no problem

I have no idea about this problem. Does anyone know what caused it?

here's my problem:

I'm using:

phaser 2.13.3 with CANVAS mode

dragonbones 5.6.2

electron 5.0.11