CMD+SPACE not working together but they works separately! Help!

Hi, I respond to myself, it is SOLVED.

I found the issue. In New Year I cleaned the magic keyboard, it was dirty, it seems that I pressed too much the keys and the key F18 was flat, I have removed the key trying to "unstick" the key with the contacts, I thought I was successful but I wasn't. The keyboard battery was consuming a lot of energy, about 20% per day, it was insane, also remember the CMD+OPT+Space didn't work properly. The solution was simply removing the F18 key again and with a kind of little stick/knife just trying to unstick the contacts again, and this time it seems I was successful. You don't realise that a key is making contact (pressed) until you unplug and plug the USB charger, you hear a noise when you keep pressing any key, and realised that if you press any key, then press a second key, that noise goes but the first key is still pressed and wasting battery, that is also the reason than that the shortcut didn't work, because the F18 was "clashing" with the shortcut, so that's the reason I would never get the magnifying glass in Photoshop, inDesign etc. Now the keyboard is working excellent again and the battery returned to normal, after charging it 100% is consuming only about 2% to 3% diary. That's another issue I read, that the battery goes quickly, it is because there is probably a key making contact, you have to find out what's the suspicious key.

Mental note: please be carefully when you clean the keys, they are very fragile!!.

Please help! any thoughts?, I discovered that if I tick the Launchpad & Dock (turn on/ff) in Keyboard shortcuts (System Preferences) and press OPT+CMD+D it works! but it doesn't work for instance OPT+CMD+SPACE, this is really strange because they work separately.