Different font size for textarea in reply when focused and unfocused.
Focused: normal font size
Unfocused: small font size
I found CSS rule which is doing this to me:
File: https://artixlinux.org/forum/themes/silence/css/FaButton.css
.sceditor-container textarea {
font: 87.5%/150% "Segoe UI", -apple-system, BlinkMacSystemFont, "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Droid Sans", "Helvetica Neue", "Trebuchet MS", Arial, sans-serif, FontAwesome;
Best solution for me is to set font size to 100%