选了三个素材 但回调方法却只返回了两个  并且通过日志查看有报错

MiniProgramError

undefined is not an object (evaluating 'e.key')

TypeError: undefined is not an object (evaluating 'e.key')

at  (parent/index.appservice.js:130:2623)

at filter (native code)

at freshChooseImgKeys (parent/index.appservice.js:130:2601)

at freshChooseImgKeys (native code)

at  (parent/index.appservice.js:130:2033)

at  (WASubContext.js:1:191444)

at triggerSetDataCallbacks (WASubContext.js:1:332156)

at  (WASubContext.js:1:330103)

at pe (WASubContext.js:1:280252)

at de (WASubContext.js:1:280145)

at  (WASubContext.js:1:280826)

at  (WAServiceMainContext.js:1:654661)

at emit (WAServiceMainContext.js:1:102531)

at emit (native code)

at dispatch (WAServiceMainContext.js:1:114611)

at cb (WAServiceMainContext.js:1:115152)

at cb (native code)

at emit (WAServiceMainContext.js:1:101903)

at subscribeHandler (WAServiceMainContext.js:1:110326)

global code@