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.
now not for real tho it would be cool if they added a secret major update aka 1.5 and it would be a secret no spoilers not telling james and when it comes out. it would be out of nowhere now this is just a idea so dont take it seriously.
Journey's End, hence "end" was the last major update for the game. This doesn't mean they stopped with the game completely just major content will not release. This is very unlikely to happen. I believe the devs have shifted their attention to Terraria 2.