TypeError: null is not an object (evaluating '(c = r.createWithTTF(a, t))._ttfConfig = a') 黑屏

使用自定义ttf字体,随机出现TypeError: null is not an object (evaluating ‘(c = r.createWithTTF(a, t))._ttfConfig = a’)错误,并出现黑屏,ios更加频繁,
creator版本为:1.8.2