Sony Mobile has been rolling out a new firmware update for its flagship Xperia XZ3 and XZ2 family (Xperia XZ2, XZ2 Compact and XZ2 Premium), which moves the firmware number from 52.0.A.8.14 to build version 52.0.A.8.25. The latest update includes the 1 April 2019 Android security patches. There is little else that we have noticed has changed, but if you have updated to this build, please chime in with your experiences in the comments below.
Thanks Daniel, Deki, Joey, Joff and Rbn!