Well, you may try altering some settings in your profile.
First, change to the default profile (not Garuda), from Konsole Menu => Settings => Change profile. Test if the default behaves better.
Next, clone your Garuda profile with another name, so you can keep the Garuda for reference.
Change to the new profile and change settings for fonts in Profile Settings => Appearance. Try some combination and test.
For a reference, I just plugged in an external monitor with not the same ratio as my main and I have no such issue with konsole.