Sony Xperia Z2 (D6503) owners in Taiwan are being treated to a new firmware update that moves the build number to version 23.0.1.A.3.12. In addition, Xperia Z2 Tablet Wi-Fi (SGP511, SGP512) owners in the region are not left out and have a new update that moves the build number to 23.0.1.A.4.44. This is a newer build compared to the 23.0.1.A.4.30 update that started to roll yesterday.
The Sony Xperia Z3 Tablet Compact has also seen these build numbers certified by the PTCRB. Software number 23.0.1.A.3.12 has been certified for the SGP621 variant, whilst build 23.0.1.A.4.44 has been certified for the SGP641 variant.
Update: This update has now started rolling for the Xperia Z3 Tablet Compact in Taiwan.
Thanks a.hamameh, Ben, difwwh and walaspancha!