Long break in ZEVS transmissions on 82Hz

The russian 82Hz ZEVS transmitter stopped working on April 4 2018 around 12:00 UTC, and so far hasn’t resumed operation (this is written on 15 April, 11 days later).
Spectrogram of the end of transmission:

ZEVS
ZEVS 20180404

ZEVS can be monitored on the klubnl.pl ZEVS grabber:

Grabber ZEVS 82Hz