I’ve changed this to a question as it isn’t an V5 issue, this is a configuration mistake you’ve made
I’m pretty sure the exclamation marks down the left hand side is telling you the printer is still in STAR mode and not ESC/POS mode which is why it isn’t printing correctly
Your screen shot shows you have a setting set to ESC/POS but have you actually sent those setting to the printer to update it?
On the star settings go to “print job routing” and turn on the feature for ESC/POS (don’t remember the name but there is only one setting on that page. That will resolve your issue.
Star printers are always a headache to be honest, what you have so far here is just the tip of the iceberg. I usually avoid them for this reason and only ever work with them when a client has existing hardware.
You’ll probably find issues printing £ which seems to be impossible to resolve - even you set language to UK or try Unicode / UTF-8, it still won’t print £ properly then as if by random it will print it, but then won’t and there is no reasoning to work out what made it work that one time!