The bug
taiga_small_house_4 has a misrotated roof block. This creates a weird visual effect.
How to reproduce
/setblock ~ ~ ~ structure_block{mode:"LOAD", name:"village/taiga/houses/taiga_small_house_4"}Linked issues
relates to 11
6 more links
Why has the Mojang Priority been even assigned if it is WAI? That doesn't make any sense