@tobiasvl and @maddu and the other people that are experiencing this issue: What is your ‘Indent using tabs’ setting (Under ‘Editor’) set to?
I can replicate this erratic behaviour only when ‘Indent using tabs’ is active. The ‘Smart indent lists’ and ‘Tab indent size’ seem to have no effect on this.
When using tabs to indent I can indeed use the mentioned code editor shortcuts workaround, but it would be nice to get this fixed of course!