SUMMARY Unable to properly make use of Backtab shell bindings in Yakuake since Konsole 18.12.0. STEPS TO REPRODUCE 1. Upgrade to Konsole 18.12.0 2. Launch Yakuake 3. Try to use a shell feature bound to Backtab (Shift+Tab) (in my case, ZSH's history completion). OBSERVED RESULT Shift+Tab now appears to lose focus (cursor stops blinking/colors are dimmed when those settings are enabled) and does not get propagated to the shell. EXPECTED RESULT Shift+Tab properly gets propagated to the shell ;). SOFTWARE/OS VERSIONS Windows: N/A MacOS: n/A Linux/KDE Plasma: Gentoo Linux (available in About System) KDE Plasma Version: 5.14.4 KDE Frameworks Version: 5.53.0 Qt Version: 5.11.3 ADDITIONAL INFORMATION This works perfectly fine in Konsole proper. Downgrading Konsole (and only Konsole) to 18.08.3 unbreaks it, which is what lead me to tag this Konsole/Kpart vs. Yakuake, but the Yakuake guys should probably be made aware of this ;).
This is still happening with Konsole 19.04.0, Frameworks 5.57.0, Plasma 5.15.4 & Qt 5.12.2 With a few things to note: In Konsole, I obviously had to disable the "Next View Container" shortcut, because it defaults to Shift+Tab ;). In Yakuake, Ctrl+Shift+Tab behaves as Shift+Tab ought to. This isn't the case in Konsole, where Shift+Tab does still work, once the conflicting shortcut is gone, but Ctrl+Shift+Tab does not.
I have seemingly related problem. I've been using Shift+Tab as a shortcut for "Next Session" action. Starting from KDE Applications 19.04.0 / KF 5.57 pressing Shift+Tab in Yakuake causes "ambigious shortcut" warning. I checked all Global Shortcuts for Shift+Tab entry and found none. I also removed Shift+Tab binding in Konsole, but that didn't help.
Related forum post with no solution: https://forum.kde.org/viewtopic.php?f=225&t=141829
*** This bug has been marked as a duplicate of bug 409563 ***
Just to confirm that the 19.08.0 release of Konsole has indeed fixed it ;). Thanks!