https://bugreport.apple.com/
Use your Apple ID to access that area. Then after a complaint follow their instructions to create the logs.
Have you also tried a hard reboot?
https://www.payetteforward.com/how-to-hard-reset-iphone-why-its-bad/
Lost 8% in 28mins of reading a forum, wow. Dreadful, any tips?
People that having problem with iOS 11 on their SE, any improvements since they released iOS11.1 ?