Hello,
I got a little issue in the latest fabric version 1.16.5, 2.0.2. When you have a guiScale:0 or Auto, the text is no longer fully readable because it gets out of bound (see screenshot below):

There should be a character limit, for me in auto it's around 42.
Thank you in advance

Hello,

This is a vanilla bug. On Forge the bug is fixed by Forge so nobody notices it. On Fabric you will need a 3rd party mod to fix the bug. For example Tooltip Fix.