Applied last update to my FP5 to FP5.VT28.C.042 and now my Bluetooth connection in my car drops right after 2-3 minutes, while I’m listening to audiobooks on Audible. Then reconnects again. It was working fine before the update.
This is unusable.
Also I noticed, that the car does not get author and other information right from the phone (though the chapter number does work on Audible).
If you bootloader is locked, then no (without a factory reset).
If your bootloader is unlocked or if you unlock it (which forces a factory reset) you might try to install an older version. But as the update was afaik a major upgrade, it might be necessary to delete all your data anyway (possibly an older major version has problems with our upgraded data).
So I think your chances are better if you report the problem to support.