Some days before i asked here, if there are any problems if you fly out of Thailand after 90 days on an one year visa and come in again without a stamp from another country. Yesterday I did it without any stress. I showed only the boarding pass, like it was advised here, and I got another 90 days at Phuket airport without any further questions. And now I enjoy some days in the pool. Stay safe everyone and have a nice weekend :-)