BUG: Select timeseries from epoch error (MongoDB 6.0.3)

Working with Data
,
1

I have this documents in a timeseries collection:

{
    "ts" : ISODate("2000-12-31T23:00:00.000+0000"),
    "meta" : {
        "addr" : "a1",
        "device" : "test01",
        "series" : "test01:a1"
    },
    "v" : 100.84432598221046
}
{
    "ts" : ISODate("2001-01-01T23:00:00.000+0000"),
    "meta" : {
        "addr" : "a1",
        "device" : "test01",
        "series" : "test01:a1"
    },
    "v" : 200.14378032120374
}
...

and if I execute the following query:

db.getCollection("timeseries").find({
    "meta.series": "test01:a1",
    "ts": { "$gte": ISODate("1970-01-01")}
})

MongoDB returns me 0 documents!!!

While if I execute this one (epoch + 1 day):

db.getCollection("timeseries").find({
    "meta.series": "test01:a1",
    "ts": { "$gte": ISODate("1970-01-02")}
})

it works!!