The way this is worded makes it very hard to understand. I’m not able to picture what it is your character is doing?
Perhaps you could do a quick screen capture, upload it to a file sharing service (such as Google Drive), then share the video of the problem with us. That would make it much easier to troubleshoot.
In the mean time, these may help:
https://wiki.unrealengine.com/Shooter_Game_-_Toggle_Third_Person