[25Dez2019 14:01:30.882] [Client thread/INFO] [STDOUT/]: [WolfShotz.Wyrmroost.event.EventHandler$Client:ridingPerspective:121]: Fired

This is part of your latest release and causes more than 100.000 lines of log in a few minutes:
https://github.com/WolfShotz/Wyrmroost/blob/master/src/main/java/WolfShotz/Wyrmroost/event/EventHandler.java#L121

If your using latest forge yes it will. However, this event never fired when this version of wyrmroost was released. This issue has been resolved in dev and thank you for the report.

Additionally, if u wish to avoid this problems now, you can use an older version of forge

No, I cloned it locally and removed the line myself ;).

I see you got this fixed so no need to report players reporting it to me. but I see there really is a fix that wasn't mentioned that resolves it somewhat.

Players only notice this issue if they have the console log on or open. So the actual solution until release is turn off the console log.