Auto captions character length is not adhered to

[Gideon5E7F]

For the auto-captions function I set the character limit to 15 characters (2 lines) but sometimes I still get lines that are longer than 15 characters.

For example:
"to get 1%
better every single day"

Also, when I have 2 lines selected it doesn't always spit out 2 lines some of the slides have only 1 line. Just wondering how it decides if it should create 1 line or 2 lines.

Premiere Pro 23.1.0 on Mac OS Ventura

[Eframe John]

Same here, when i put 18 characters i got more than that, so my 2 line caption becomes 3 lines which i don't want to use most of the time.
Hopefully we can get some answers because this is really useful in vertical videos.