Cannot read property 'timestamp' of undefined

[lhsm]

Hi.
Zipkin UI starts with error
error_handler.js?934c:54 EXCEPTION: Cannot read property 'timestamp' of undefined ErrorHandler.handleError @ error_handler.js?934c:54 error_handler.js?934c:59 ORIGINAL STACKTRACE: ErrorHandler.handleError @ error_handler.js?934c:59 error_handler.js?934c:60 TypeError: Cannot read property 'timestamp' of undefined at eval (webpack-internal:///165:117:70) at Array.sort (native) at Array.sort (webpack-internal:///875:21:15) at Trace.sortTrace (webpack-internal:///165:117:23) at eval (webpack-internal:///165:120:23) at Array.forEach (<anonymous>) at Trace.sortTrace (webpack-internal:///165:119:27) at eval (webpack-internal:///165:120:23) at Array.forEach (<anonymous>) at Trace.sortTrace (webpack-internal:///165:119:27) at Trace.getSortedSpans (webpack-internal:///165:80:14) at new Trace (webpack-internal:///165:55:32) at eval (webpack-internal:///165:157:65) at Array.map (<anonymous>)
If i understand correctly expected structure of traces (response of api/v1/traces) is ..{"traceId": "trace", ..., "**annotations**"} .. - annotations is mandatory.
But in my case trace looks like [ [ { "traceId": "fca49abacae88255", "id": "fca49abacae88255", "name": "", "timestamp": 1509704101447000, "duration": 55875, "annotations": [ { "timestamp": 1509704101502875, "value": "ss", "endpoint": { "serviceName": "", "ipv4": "", "port": 8080 } } ] }, { "traceId": "fca49abacae88255", "id": "8382a3fc6365f507", "name": "", "parentId": "fca49abacae88255", "timestamp": 1509704101455000, "duration": 22310, "binaryAnnotations": [ { "key": "OUTPUT_MESSAGE", "value": "", "endpoint": { "serviceName": "", "ipv4": "", "port": 8080 } }, { "key": "lc", "value": "unknown", "endpoint": { "serviceName": "", "ipv4": "", "port": 8080 } } ] } ] ]
"Traditional" ui works fine with that trace