2.4.9 热更新getPercent为NaN

[807605555 (goshanggo)]

09-28 17:43:38.064 31093 31121 D jswrapper: JS: updateCb(event) event.getEventCode() = 5

09-28 17:43:38.064 31093 31121 D jswrapper: JS: event.getPercent() = NaN