The Bug
Sunflower heads are stretched vertically. This issue did not happen in 1.7.
Steps to Reproduce
Place down a sunflower.
Look carefully at the head of the sunflower plant and take note as to whether or not it's vertically stretched.
Observed Behavior
The sunflower head is vertically stretched.
Expected Behavior
The sunflower head would not be vertically stretched.
Linked issues
relates to
Attachments
Comments
Affects 1.16 Release Candidate 1

In 1.16.4 and 20w48a

Fixed model attached.
Can confirm in 20w51a.
Can confirm in 21w03a.
Confirmed in 21w05b
Can confirm in 21w06a.

In 21w08a

Relates to MC-212747

In 21w11a
Can confirm in 1.17.

Can confirm in 1.17.1 Release Candidate 2.
I am able to confirm this behavior in 21w41a. Here are some extra details regarding this problem.
The Bug:
The sunflower plant texture is vertically stretched.
Steps to Reproduce:
Place down a sunflower.
Look carefully at the plant of the sunflower and take note as to whether or not it's vertically stretched.
Observed Behavior:
The sunflower plant texture is vertically stretched.
Expected Behavior:
The sunflower plant texture would not be vertically stretched.

Can confirm for 21w41a. Requesting ownership as the creator has no activity since April 2020.
Can confirm in 1.18.
Can confirm in 1.18.1.

This appears to have originated at some point in 1.8, as 1.7 does not have this issue (in addition, the sunflower heads appear to have a slight sideways rotation in pre-1.8 versions as well - not sure if I should report this):
[media]

It seems the rotation of the flower head was slightly randomized in 1.7. I don't think that's really possible with the current allowed model angles though.
Can confirm in 1.19 and 1.19.1 Pre-release 1.
Can confirm in 1.19.2.

Can be fixed by setting "rescale": false
to the flower plane. The attached model fixes this issue, as well as MC-90566
^^
Confirmed for 1.13.1.