Can't add more than 3 Flic buttons?

Have added buttons in the past to Homey without any problems but now I can’t seem to add any more. Currently I have three added, have any of you been able to add more?
I’m using the Flic hub.

Not a direct answer, but I have 6 buttons and a Twist. I don’t have any of them set as Homey devices though. Instead, I use a combination of the native Flic support for Homey and web requests (local via the excellent Micro Web Server app). All work fine.

Andy