We recently reported that a number of Sony Xperia X Performance owners were suffering from problems relating to the accelerometer, where it would suddenly stop working. The only solution up until now was to restart your phone, but Sony has today issued an update in the form of build number 35.0.A.1.297 which should fix this bug.
The update is seeding for both single SIM (F8131) and dual SIM (F8132) variants of the Xperia X Performance. We will link to the relevant FTF firmware files shortly, but in the meantime, do let us know if the new firmware solves the accelerometer bug, along with any other changes you’ve noticed.