My env: Win10, Intellij 2017.3, Logitech g510s (both alt say 'alt' - no altgr), system lang - us, input method - polish programmers keyboard
In all JetBrains IDEs right alt behaves like ctrl+alt. If I want to use polish letter ż - Ralt+z IDE reads it as ctrl+alt+z and reverts changes. Supper annoying. Almost all polish accented letters are affected and so few other shortcuts that should work with ctrl+alt but work also with Ralt.
I searched a lot because its super annoying but either problems were back from 2008 and resolved or didn't match my case.
I also tried the following (true and false) but it didn't work.