Since about two to three weeks Kodi takes a long time (~4min) until it is able to stream IPTV. I've looked into the logs and found that Kodi waits for a broken URL, which delays the startup of the IPTV client.
I'm running LibreELEC 12.2.1 on a Raspberry Pi400. (Upgraded from 12.0.2 since i hoped the upgrade would fix this)
I would have opened an issue on Github, but the new-issue template told me to come here.
I've attached a crash report that is produced while waiting for the broken URL. Note the last few lines where it trues to load an EPG file.