Moving blocks are incorrectly lit with the "Smooth Lighting" option enabled

Actually, this started on 26.3 snapshot 5, but I just found it. So, even though I’m reporting it as 26.3 Snapshot 7, it’s started in 26.3 Snapshot 5. Anyway, this is something a bug(?) that the light flashes everytime the block gets pushed or pulled on pistons. It doesn’t matter what type of piston you use, but it flashes. And it is not the redstone torch’s light. The video with light blue wool slab is recorded in 26.3 Snapshot 3, and the other one is in 26.3 Snapshot 5. It’s all the same since 26.3 Snapshot 5. Snapshot 4 is same as Snapshot 3.