It can. A boiler that isn't operating efficiently may need to run for longer to produce the same amount of heat, which can increase LPG consumption.
Faulty components, worn parts, blocked systems, problems with heating controls, or an incorrect boiler setting can all affect efficiency. If you've noticed a sudden and unexpected increase in LPG usage, or your annual boiler service is overdue, it may be worth having your boiler checked by a qualified Gas Safe engineer.