One-Touch Dial-in: Commas vs. Semicolons

This is a silly question.

I tend to connect to Zoom meetings from Outlook invitations created by people using the Outlook plugin (which I do myself).  Most or all of these meetings include one-touch dial-in strings that I use to connect through my phone for audio (I just prefer this to computer-based audio).

It seems random, but some of these dial-in strings use commas (timed delays) between the phone number and the meeting ID. Others use semicolons (which lead to user prompts).

Does anyone know why?