TimeSeries plots fail for Frank Lab data

The Frank Lab is unusual in that they use 1970-01-01 as the reference time for all of their data. I'm not sure why but it looks like this is causing the time series plot to fail.

https://neurosift.app/nwb?url=https://api.dandiarchive.org/api/assets/2d36011d-e46a-4811-a391-014f9dc059fb/download/&dandisetId=001607&dandisetVersion=draft&tab=/acquisition/e-series


