Best to get logs after ensuring debug logging enabled and restarting the server and reproducing the problem
For iOS app - see this support page for getting logs emailed to yourself for attaching here
https://support.plex.tv/hc/en-us/articles/201636593-iOS-Logs
For server logs - see
https://support.plex.tv/hc/en-us/articles/201643703-Reporting-issues-with-Plex-Media-Server
https://support.plex.tv/hc/en-us/articles/200250417-Plex-Media-Server-Log-Files
