The insert dialog doesn't report errors and it throws an uncaught rejection. Ignored in 1.40.2, blows up the app in main.

For example:

/** 
* Paste one or more documents here
*/
{
  "_id": {
    "$oid": ""
  }
}

causes:

Uncaught (in promise) BSONError: input must be a 24 character hex string, 12 byte Uint8Array, or an integer