You know I noticed today that my G600 was working finally without having to push CTRL on the Keyboard. I just figured that Sony or SE fixed their ends and my G600 with saved profile from GHUB finally knows how to use G9-G20 as CTRL+#

I have tested the keyboard after reading your post while searching online if the issues were indeed fixed, and they work fine the 1-= and ALT-1-= all work fine. I don't know what's going on but if they did fix this then I am happy because having the G600 is a huge QoL upgrade playing on PS4/PS5