Recently I tried to order panelized 15mm PCBs via JLCPCB and my order was cancelled as size of my PCB is smaller than 20mmx20mm (I have not found this limitation). Should I search for another PCB manufacturer to produce my boards in panel, or there is a way to produce my board ? I made couple of orders with panelized 15mm boards (4x4pcs) before and those were produced without problems. JLCPCB support sad that was a case of bad review of my orders.