Since v25, active text edit fields are truncated in the essential graphics panel.
1. create text layer
2. drag text>source text to the essential graphics panel for mogrt authoring.
3. click on the edit field for the source text in the essential graphics panel
result: As soon as you are editing the text string, only ~14 characters are displayed. No edit cusor is displayed.
Windows 11 pro versio 10.0.26100, After Effects v25.1.0 build 68


It's annoying. Workaround is composing your text string in notepad, then copy/paste.