Tonight I updated all my hubs to the latest release. After doing so all drop downs for selecting a device shows all the hub mesh devices OFFLINE.
The devices in the list that are shown as offline are not, and when you click the list you can select the devices and then the offline indication will go away. The one device not listed as offline is a virtual shade that resides on this hub, all the others are hub mesh devices. This does not seem to be app specific. It did this when adding a device to a dashboard, when I added a device to the Device activity app, and when I added a device to a list in a RM rule.
This is probably due to my hub mesh rules configuration. I have one hub that contains all my rules and cloud based devices. All Zigbee and Zwave devices are on separate hubs and linked through hub mesh. When I rebooted the hubs after the firmware update I did my instrument hubs first and the rules hub last. After I get all my hubs back up and running I go to the rules hub device page and keep refreshing until all the devices show back online. It usually takes 3 to 4 refreshes before everything comes back.
This is not a big deal just something I thought I would report. It has been a good 30 minutes since I upgraded firmware and rebooted and the devices in these list still show as offline. They all show as online on the device page.