Anyone else difficulties with Homekit app reporting "Cannot read property 'getHASID' of undefined" whilst adding devices?

Although it has been working (more or less reliable) before, since yesterday in Apple Home all my devices previously added in Homey via the Homekit app (v1.5.1) are not responding anymore.
When I look into there app settings in Homey, surprisingly I discovered I can (re-)add all devices again .
When I try to do so, Homey responds with an error message “Cannot read property ‘getHASID’ of undefined”.
Anyone an idea what causes this, or how to solve this issue? TIA

It’s a bug in the app, I think the best option is to create an issue on Github to notify the developer about this.

Thx. will do so.