SUMMARY If there are “previous paths”, Alt+Left goes to the previous one as expected. But if there are no more previous paths, the Alt key is effectively ignored and the selected file changes instead. Alt+Right exhibits equivalent behaviour. STEPS TO REPRODUCE 1. Navigate through some directories and go some steps back. 2. Use Alt+Right until you reach the most recent path. 3. Press Alt+Right again. (It does not matter if you held down Alt all the time.) OBSERVED RESULT Assuming the current path has some files or directories, the selection moves to the right. EXPECTED RESULT Nothing should happen. This is the behaviour one has gotten to know from web browsers, for example. MAYBE one could give some feedback that this operation is not available right now. SOFTWARE/OS VERSIONS KDE Plasma Version: 5.24.2 KDE Frameworks Version: 5.91.0 Qt Version: 5.15.2