Tweet button from the same answer always gives distinct link

Question

The same issue, described in

• Tweet button from the same question always gives distinct link

only when posting from answer (instead of question)

Checked on my answer to question "What is a term for a system with rules without any exceptions?

Update:
I opened follow-up subquestion

• When is “tweet your answer” button available?

telling basically that I cannot document or reproduce this since this tweet button/link does not reappear in any of my answers.

Answer 1

I can't reproduce this. I get the same link every time when I click the dynamic answer sharing links: