For issues you find with the Switch and Console releases, please follow this link and give as much detail as possible. This is the speediest way to get info to Pipeworks and get a hotfix in the works.
1.4 will bring many changes to the PC version. We strongly advise making plans to back up your worlds and players prior to updating your game. More details here.
Begin your search for Journey's End information here and here. Please report bugs and issues for Journey's End here.
For issues you find with the Mobile 1.3 update, please follow this link and give as much detail as possible. This is the speediest way to get info to DR Studios to look at your issue. Also, some troubleshooting hints here.
It's so weird to me how some people think suggestions require less thought than mods.
You have to actually worry about balance with suggestions. With mods you don't have to unless you specifically want to.
Hang on, I just realized that the spoiler for music for "an existing event" hasn't really been discussed too much yet... Here are all of the different events that don't have music yet if you're curious: