db.getReplicationInfo() gives invalid output

When you run db.getReplicationInfo() then the output is not valid. Result is like this:
 

{

  configuredLogSizeMB: 990,

  logSizeMB: 990,

  usedMB: 980.21,

  timeDiff: NaN,

  timeDiffHours: NaN,

  tFirst: 'Invalid Date',

  tLast: 'Invalid Date',

  now: 'Tue Mar 21 2023 16:03:39 GMT+0100 (Mitteleuropäische Normalzeit)'

}

timeDiff, timeDiffHours, tFirst, tLast are invalid values.

As workaround one can call rs.status() and compare optimeDate of members. However db.getReplicationInfo() should work as intended.

Kind Regards
Wernfried