Initially, this logo was displayed for one day, on April 23, 2017, in a period between 12:25pm and 11:30pm (according to MSK+2), at which it would be reverted to the 2015 logo. This was shown just as an on-screen bug.
On its April 23 appearance, this logo was chosen to appear through voting. It was returned, but permanently, on July 30, 2017. 
PF Agora Slab Pro
August 18, 2018
Version of the logo with the subtitle «Телеканал»