nothing weird about masks ๐ท. Itโs not a Covid mask per se. I have been in Asia since 1993 and they were wearing them then. Masks are worn when someone has a cold, flu, etc.
I think it all comes down to the Immigration Officer on duty. Before I retired, I was transferred to China for a couple of years. I came back to Thailand 6 or 7 times a year without any questions asked.