[LayaAir 2.0]多指操作，会导致闪烁问题

E/jswrapper: ERROR: Uncaught SimpleSingletonList:[object Object] has  in  SingletonList., location: /data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.d3.js:0:0
    STACK:
    [0]n.add@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.d3.js:17
    [1]t._changeTouches@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.d3.js:9
    [2]t._update@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.d3.js:9
    [3]s._update@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.d3.js:20
    [4]h.render@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.core.js:14
    [5]h._loop@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.core.js:14
    [6]r@/data/data/com.nearme.instant.platform/app_game/app/com.qire.kpccc.nearme.gamecenter/2/libs/laya.core
08-06 10:58:28.228 28118-28224/? E/jswrapper: [ERROR] (/home/game/jenkins/workspace/SafeBuild/XGame/instant2d-x-lite/instant/./scripting/js-bindings/jswrapper/v8/Object.cpp, 627): Invoking function (0xd5c31040) failed!
 
添加物理引擎后，在多指操作的情况下会出现这种报错