This is similar to 337241, but looks like a distinct problem.

Reproducible: Always

Steps to Reproduce:
1. open Konsole
2. open a second tab with Ctrl-Shift-T
3. use Ctrl-Shift-Left to move the selected second tab to the left -> tabbar disappears



The tabbar stays hidden when tabs are moved again, but it reappears on the next Ctrl-Shift-T. It does not disappear when there are more than three tabs, and only when the tabbar is configured to be shown when needed only (i.e. only for >1 tab).

My suspicion is that the reordering is done by removing one of the tab (which causes the tabbar to be hidden) and inserting it at the new position (which *should* cause the tabbar to become visible once more, but that step seems to be broken).