Dolphin & Konsole render Text to big

Today I changed to the testing branched and after updating via pacman I noticed that the fonts in Dolphin & Konsole get rendered too big.

Edit:
I found some related topic here.

Read here.

You need to export QT_ENABLE_HIGHDPI_SCALING=0 in environment like:

echo "QT_ENABLE_HIGHDPI_SCALING=0" >> ~/.pam_environment

then re-login.

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