Time series collections containing dates outside the epoch will no longer be using _id or the clustered index for filtering. This can be mitigated by adding an index over control.min.[time_field] to the bucket collection.

Description of Linked Ticket

db['test-array-ts'].countDocuments({
  date: { $lt: ISODate('1970-01-01T18:31:22.000+00:00') }
})
result: 149

db['test-array-ts'].countDocuments({
  date: { $lt: ISODate('1965-01-01T18:31:22.000+00:00') }
})
result: 1989943