BENGALURU: Even as thousands of Metro commuters are making use of the recently launched Quick Response (QR) ticketing system of the Bangalore Metro Rail Corporation Ltd and its WhatsApp Chatbot to book tickets, its server crashed on Monday around 4.30 pm, forcing the public to queue up at stations. Top Metro officials confirmed to The New Indian Express that the BMRCL server suffered a technical glitch and the process to set it right was underway.