An accounting glitch with xero when 100% discounting an item

22 0 17

I always offer a promo of a free lip balm when a custom buys 3 soaps. I go into Shopify POS and select the lip balm and then discount it 100%. What happens at the end of the day is that it won't send over or batch that sale and I have to go in manually and do it. Is there some way around this, or can this be fixed so it will won't require the manual entry?

Thanks in advance!

Roshan Richards