Item duplicated when adding product in Safari

Hi there,
I am new here and already loving this application.
I am having issue when creating Proposal where I found that the product I added was duplicated upon entry.
The strange thing is that I found this when checking the generated PDF file. Then when I refresh the page, I can see that the product has been duplicated.
The more strange thing is that this only happened in Safari browser. Not in Chrome or Firefox or Edge.
Anybody else seing this?
Thank you and stay safe.

Zala.