@Emil I hate bluetooth. It worked fine from another phone, so I removed the hub from my primary phone and re-added it. Still didn't work, so I cycled BT on the primary phone, connected with no problem. sigh Not sure why I didn't try that before. Thanks for the pointer! (Taking logs reminded me how awful BT is)
I have an LR hub that I have been using for about a year (replaced my old LR hub with a broken USB power connector) and it has been running fine (I was able to connect via the app, also via hubsdk.flic.io, and all the buttons generally work). Yesterday I went to add a new button, which I do from the app, however when I attempt to connect to the hub I get a "Found Hub Connectig..." message, but it never connects. Buttons and hub sdk connect with no problems. Hub firmware is 4.2.13, the light on the back is solid red (normally is), app version is 3.10.3 and Play Store says there is no update. Has something changed recently? I see at least one other recent post about the Android app failing to connect, no idea if that is related.