I have an issue with the date selector. I have tested in both chrome and firefox and i’m see the same behaviour. I am using OSTicket 1.14.2 and your version 103 of osticket awesome.
When used at the top of the page the days just seem to go outside of the frame a little bit, no real issue here. The below image is when updating due date.

However the behaviour is different when you scroll down the page. The top of the selector appears to open off screen which means we then cannot see which month it is to select the correct date. This is when editing in the ticket view, editing per field, as per the below image.

However if you edit the ticket and go to the page where all fields are editable it displays fine as per the below image.
