Why don't they just send out a rollback to previous firmware, why even update it at all if it works fine.
Sounds like they now understand the issue, and can resolve/work round it.
An interesting observation is that in a connected world one sometimes relies on multiple parties providing data and/or services to work together. If one of them changes something it can cause unexpected problems elsewhere and leave you pointing the finger at (potentially) the wrong party.
Sony also acknowledged the fault on its official support forums, seemingly blaming Freeview owner and provider Arqiva for the problem, while offering workarounds for affected users.
A member of the support team wrote: "It appears something has changed in the way that these devices are receiving EPG data from Arqiva, the people who own and operate the Freeview standard for the UK.
"So we are already trying to understand what has happened and how this can be rectified, realising that a large number of people have been affected."
In an update on Sunday morning, Sony also claimed the problem has been
resolved for some users.
"Many users are reporting that the issue has been resolved and their devices are now able to correctly re-tune and received correct EPG date. Please post back if you are still experiencing problems," the company wrote.