@mbish92 I recently upgraded to 1.3.0 Build 20250721 Rel 8514, which came up as an offical upgrade through the app. Upgrade itself went smooth, but I feel that some of my issues have returned (things were quite OK-ish with the latest manual fw upgrades). Especially Sonos is now a major issues: speakers are dropping and cannot be reconnected... Tried everything but some of the speakers simply will not connect to the Wifi anymore (mix of older and newer i.e. 2.4 and 5Ghz); and also some are connecting (also mix of old/new). Tried to go back to a 1.2.14 fw but the interface did not allow me to...  I guess now waiting for yet another fw upgrade? Any thoughts welcome :)

  @MickF Well, you answered my quetion in another post, then. Does this new FW have the 2.4Ghz bandwidth fixes? I guess, no. I the firmware notes for this release I did read a warning that was there on the download page stating that you could not downgrade from this version is applied, so, there may be no going back, which is why I asked that question in another post. Never got answered btw - But, I think we have our answer now! Here's hoping for some new updates soon.

  @MickF did you try 1.2.14 Build 20250818 from another thread? That one still works well for me. 
 

Also if you have an app on your computer that will show all the channels of all the WiFi APs in range, I'm wondering if your APs are all on different channels like the Beta firmware does or if they're all on the same one like the release firmware does. 

  @pjs_gsy Indeed - I guess rookie mistake to assume that a higher version number would include all fixes and functionality from lower version numbers... Sonos speakers dancing in and out so 2.4GHz fix not working anymore. Just wanted to be compliant to the 'always use last firmware' mantra!

  @rd117 - Yes that was the version that I had upgraded to some time ago, and indeed was fixing most if not all of my issues. Sometimes a Nest cam or smoke detector would drop out but that might be range issue. As my reply above, just assumed that this fw would include all previous fixes.

Good point on the channels: I just checked and they are all on Channel 6, Channel 36 and Channel 36. So that is likely to be the issue then.

Short update from me, after the previous posts about the latest official firmware not containing the 'channel fixes' that were in the beta fw: I informed the support desk about my situation and received a promising reply within a few days, that a senior engineer would review and see for a new beta firmware. Which indeed within a day was sent to me! So I immediately installed this 1.3.0 Build 20250917 Rel. 37734 on my 5x XE75Pro which resolved my Sonos and Nest Cam issues within minutes!  Also they confirmed that the intention is that this fix will now be part of the upcoming official release. For completeness: my XE50 is on the older 1.3.0 firmware still but seems not to cause any issues. So very happy that this was so quickly resolved (although arguable this should not have happened in the first place).