Shelly action card stopped working

I’m using a Homey Pro and around 75 devices from Shelly. A few days back my buttons stopped working.

I realised that in fact the “action event” do no longer find any Shelly devices but only shows an empty list. All devices works as before and actually also flows with the “action event” but those flows cannot be updated.

I have restarted Homey, updated all SW/firmware and tried everything I can think about but without any result. The Shelly app in Homey is running and there are no error messages anywhere. I can reach all devices via their IP or via Shelly’s own app.

Anyone having an idea how to solve this?

You already asked here: Shelly - Action event stopped working