My GO-E Homefix had some temperature-related problems (oxidized Pin of one plug, overheated pin-case smoldered). I send the box to GO-E, they offered to send me a new Gemini for an interesting price.
In https://github.com/openhab/openhab-addons/issues/15075 a problem with decimal instead of integer values is stated. I didn’t have this problem with my old box although it had the newest firmware version.
I had to switch from API version 1.0 to 2.0. This solved the integer / decimal problem.