creator 2.0.9 微信小游戏2.6.6 ios Label destroy 微信闪退

不定情况下
iPhone
微信小游戏 2.6.6
creator 2.0.9

onDestroy() {
try {
this._assembler && this._assembler._resetAssemblerData && this._assembler._resetAssemblerData(this._assemblerData);
this._assemblerData = null;
this._letterTexture = null;
if (this._ttfTexture) {
this._ttfTexture.destroy();
this._ttfTexture = null;
}
this._super();
} catch (e) {
cc.error(e)
}
},

cachemode 为none

this._ttfTexture.destroy()会导致微信闪退

请问一下还记得怎么解决的吗