Chaos on 6712 kHz (HFDL basic freq)

A couple of days ago I was monitoring 6712 kHz.
The frequency is listed for Reykjavik Ground station, but on the air was Krasnodarsk Ground station.
As was not enough strange, on the same frequency a lady was dictating numbers... No, it was not a "Numbers station" in the classic mean. It sounds more like a network controller...
At the top, was a Jamming signal...

After a few minutes, the lady ceased transmission and Reykjavik GS was back on the air!!!

Very strange!

Here is a record.