The bug
Unlike other flowers or plants sweet berry bush cannot replace snow layer, grass, tall grass, fern and large fern.
Linked issues
Comments 14
Relates to MC-140651
Although fixed in 19w11a for grass, tall grass, fern and large fern; the berry bushes still cannot replace snow layers (as by issue title).
It fixed in 19w11a the berry bushes can now replace snow layer (but not snow layer 2 like other plants).
Can't replace grass, etc. either.
Relates to MC-130017