Created attachment 102457 [details]
cli output

Krita 3.0.92 (git decde84)
Qt: 5.7.0
Kde plasma: 5.8.4
Kde frameworks: 5.28.0
Linux 4.8.10-1-ARCH

Graphics card R9 280, xf86-video-ati driver 

I have three rendering problems when using the multiline text tool. Steps to reproduce: select the text tool, then in tool options choose "multiline", then click and drag to create the box. Start typing.

First problem: bad rendering while editing.

Second problem: it's worse when I select text.

Third problem: select text. Now choose "shape manipulation tool". Click on the text in order to move the textbox (exactly where the characters are). The text will be highlighted with a blue background. This doesn't go away until I edit the text. This doesn't happen if I click with the manipulation tool in the textbox but not over the characters.