I use KDE plasma in Wayland mode (kwin is the Wayland compositor) on Gentoo Linux. I use
- kde-plasma 5.16.2
- kde-frameworks 5.59.0
- kde-apps 19.04.2 

I start konsole (or kate or any other program) and resize the window so that there's some space between the konsole window and the KDE task bar at the bottom of my screen. I close konsole with File / Close window. I restart konsole and the window is bigger than before. Every time I start konsole, the window grows bigger and bigger. After I opened konsole 3 or 4 times, the Konsole window is so large, that its tab bar at the bottom is hidden behind the KDE taskbar at the bottom of my screen. That's annoying.

Reproducible: Always

SOFTWARE/OS VERSIONS
- Gentoo Linux: default/linux/amd64/17.1/no-multilib
- Linux Kernel: 4.19.50
- GCC: 8.3.0
- KDE Plasma Version: 5.16.2
- KDE Frameworks Version: 5.59.0
- KDE Apps: 19.04.2
- Qt Version: 5.12.3