did you ever get a solution? The problem we have is that we have three registers in the store and even though we select each registers default printer, Shopify POS keeps changing the default printer. Why cant we lock each printer to a single POS?
No, it just sorted itself out after an update. Although, in the mornings we have to remove the printer and re-add it via setup about 30% of the time. Don't know why, there have been years when the connection always works then after updates, periods where it requires constant management.