What are the latest updates on the Tourist Visa and entry regulations at Suvarnabhumi airport in Thailand?

Hi all, I’m looking for some advise on Tourist Visa and some rumors appearing lately.

I have been on tourist visa the past year flying in and out (left a Non-B working visa after 8 years last year)

1. Did Vientiane stop approving 90 days visa if one has already been giving within a 12 month period (say an article/conversation few days ago)

2. And what is the action on arrival at Suvarnabhumi airport with arriving (automatic 30 days entry) and having 12 months sequential tourist stamps and risking denied entry. (Will be applying for student visa in a few months)

Thank you all, and happy Sunday