Something changed the distinctive "tango" style sometime between August 2020 and June 2021, making it much less attractive.

I describe the issue in detail at the Kaggle link below. I include there screenshots showing the problem.  In the comments, user @headsortails delves into the matter and states where he thinks the problem is.

Link:
https://www.kaggle.com/discussions/questions-and-answers/378497