Custom Calendar breaks JSON export

Platform & OS Version

Platform: Windows

App Version

Version: 3.5.49
Application Shell: 3.5.36

Problem Description + Screenshots

When you Edit the Calendar the json export no longer shows any start or end dates.
I tested changing the number of days in a month and hours in a day. It causes the bug individually and when done together.
When I undid the event creation, changed the calendar back to standard, and created a new event again the JSON had dates again.

Example:

{
  "id": "Gro37tw7t6XCxE1zctT7H",
  "type": "defaultEvent",
  "label": "Girls sent to Wildlands",
  "start": "",  !!<== Here !!
  "latestStart": null,
  "earliestEnd": null,
  "end": "",  !!<== And here !!
  "ongoing": false,
  "super": null,
  "propertyValues": {
     "color": "mono",
     "links": "",
     "attachments": "",
     "tags": ""
   },
   "locationUri": null
},

Steps to reproduce

  • Create a timeline and edit the calendar to not be our standard
  • Create an event
  • Export as JSON

Answer the following questions, if possible:

  • Are you able to reproduce this bug reliably? - Yes
  • Can you make this bug happen with a clean timeline file? - Yes
  • Does it only happen with a specific timeline file? - No