OH3 Hue Emulation bug

I am running openHAB 3.4.0.M2 and have Hue Emulation which exposes few items to Alexa.
My problem is that all items/devices (tagged correctly) with an “uniqueid” (which is generated automatically) ending with a number greater than FF are not found by Alexa. The other ones work perfectly. I was wondering if this could be a bug.
Thanks for any suggestions.