I have 2 languages installed, normally I switch between them using CTRL + SHIF combination of keys. I updated few months ago Ubuntu to 17.10 and now I can't work in my IDE or other programs where I use CTRL + SHIFT + [SOME_KEY], because in 17.10 handles it the wrong way. Where as previously (in 17.04), I didn't have such problems. So, basically in the programs I can't use CTRL + SHIFT + F for example, it just switches the languages.
P.S. Please, don't propose the solution to change the combination of keys to switch the language.