Opened an AI file created April 2021 (using Optical kerning) to make changes. Kerning looks ok when I first open the file, but when I click on the text, the kerning changes significantly.
The font used is Georgia. Mac OS 10.15.7. Illustrator 2021 25.3.1. I had to open the file in Illustrator 2020 and copy the kerning values between the letters. I then opened the file in Illustrator 2021, changed from Optical to Metric and entered the kerning values from the Illustrator 2020 file.