Amazon has released a couple new minor software updates to Fire TV devices. It seems as though these updates are only rolling out to the 2nd-generation Fire TV Stick and the Fire TV Edition televisions. The Fire TV Stick 2 appears to be receiving version 18.104.22.168 (Build 574263320). This is the same version number that is already on the device, but with a slightly different build number which ends in 3320 instead of 3220. The Fire TV Edition televisions are receiving an update to version 22.214.171.124 (Build 577225520). Again, this is the same version number that is already on those devices, but with a different build number that now ends in 5520 instead of 4220.
Amazon has not published any information about these updates, so there’s no sure way to know what changes they make. Usually, when the version number stays the same and the build number changes by one digit, like with these two new updates, it means the previous software update introduced a new bug that is now being corrected.
Most likely, the main purpose of last few software updates has been to add background components necessary for external Alexa devices to control the Fire TV, Fire TV Stick, and Fire TV Edition televisions. Now that the feature has been officially launched, new bugs have probably emerged that are being fixed with these two latest software updates.