KDE taskbar disappears

Describe the bug
When I start flameshot to take a screen shot,all item will be magnified,and taskbar disappears.
Like this:

To Reproduce
run flameshot gui command.

Expected behavior
All item don't be magnified.

Desktop (please complete the following information):

• OS: [OpenSUSE Leap 15]
• Version [0.51]

[lupoDharkael]

looks like a dpi/scale factor related bug. I don't have a hidpi monitor so it's hard for me to solve this kind of bug