I recently purchased two Yeelight 2nd generation color bulbs. After using them for a few hours without any problem, suddenly both of them appeared offline. I tried reseting them but it didn’t work, so I deleted them and tried adding them through the Yeelight app once again. Trying to do that, I got a message “Connection failed” while the procedure was at 25%. I repeated the same process several times but it didn’t solve my problem. I turned off and on my router as well but still no progress. I also tried the same by connecting to different servers. When they worked properly at first I was using the Germany server. Idk what the problem is and I really hope it’s not a fault of the bulbs. Any help? I would really appreciate it! Thank you in advance.