It may have already been officially published for legal purposes, but not yet posted to the website, hence why field reports have a 4pm starting time vs. earlier today >
the Thai language (on the Thai Embassy website: Thai language version) does say what you have surmised, as the Thai wording has somewhat more precision and clarity....
Thailand DCA (Department of Consular Affairs, Thailand MFA) has updated the list of Visa Exemption (ผ. 30), Bilateral Exemption (ผผ. 30, ผผ. 90, ผผ. 14), and Visa on Arrival (VOA 15 days) as of 09 May 2024 to update:
India and Taiwan 30 Days Visa Exemption period is extended to 11 November 2024 and Russia 90 Days Visa Exemption period is extended until 31 October 2024