fig2plotly does not handle timeseries plots

fig2plotly fails completely if I provide it with a timeseries plot that has datetimes on as the x-axis.
Here's an example with a tscollection mydata, where mydata.Time is double data that is posix time (seconds since epoch), and the mydata.TimeInfo.StartDate is '01-Jan-1970 00:00:00.000'.

fig = figure; plot(myData.accelmeterZ_mps2)

fig2plotly(fig);

Error using response_handler (line 31)
Hm... Plotly had some trouble decoding your 'args'. Are you sure your data or styling object is in the right format? Check out
the examples at plot.ly/api for guidance.

However, if I just plot the underlying data, it works just fine:

fig2 = figure; plot(myData.Time, myData.accelmeterZ_mps2.Data);

fig2plotly(fig2);

まず、fig2plotly(fig) を使って tscollection の例で失敗を再現し、次に myData.Time と myData.accelmeterZ_mps2.Data の正常に動作するプロットと比較します。31 行目の response_handler エラー付近で、datetime または timeseries のプロットデータの処理を調査します。timeseries の figure が Plotly のデコードエラーなしで正常にエクスポートできれば完了です。