Hi Mojang! That's a little bug but bug is bug so i gonna report! Has you know for meany time the stair's and slab's have a lot of ilumination bug's, most of them was resolved but someone no, like this... Well the bug is, When you put a stair and you gonna break it, The half ( or the end) of the stair get more dark, is like you put a Oak stair and when you are broking it the end of the stair turn in Spruce Stair's! This always happen's on stair's but on slabs just a few time's.

Thank's Mojang and bye bye!

and i put on the versions just 1.16.40 because i don't test in beta!

Oh and Jira is bugged sain that i need i token or something like this to put the image, but to reproduce is easy, just put a stair and start to broke it so you gonna see