On 26 October 2014, following another change in the law, the clocks in most of Russia were moved back one hour, but summer Daylight Time was not reintroduced; Moscow Time returned to UTC+03:00 permanently.
This is why the premise of OP's photo is incorrect. The changeover was not this past March, it was 2014.
Occam's Razor would tell us that this simply is just a screwup of whoever is manually setting those clocks.
(post is archived)