Can STV holders apply for a Covid Extension in Phuket?

A user visiting Phuket Immigration faced a denial for a 4th Covid Extension under the Special Tourist Visa (STV). The immigration officer cited new rules effective from January that disallow extensions for STV holders, prompting the user to seek confirmation from the community. Responses indicated that while some immigration officers may refuse the extension, many assert that STV holders should still be eligible to apply. Other advice included visiting a different immigration office and ensuring all requisite documents, like the TM30 receipt, are prepared prior to application.