Amateurs!

Doing a socket tutorial, which, basically, puts a sword into the hand of a character.
After doing so, every time I swing the sword when facing the camera I have a graphical glitch; quite hard to explain, it’s like if the sword was springing out of the screen to cut my nose.
Funny.

First thing I do is go to the Questions and Answers section of the course and ‘lo and behold, what do I read as answer to that very problem?

Christopher — Instructor · 2 years ago

It is interesting the issues that pop up when you change a small detail. It is amazing how many bugs can randomly appear, that have simply been hiding because of a very specific set of circumstances.

Anyway, mini rant over :D

Sucker!
I found my answer in minutes, I have to specify a custom collision rule ignoring the spring arm of the camera:

change the collision preset from IgnoreOnlyPawn to Custom. This should maintain all the settings from IgnoreOnlyPawn, but allow you to modify them. Under Trace Responses, change Camera from Block to Ignore

If even the Epic team don’t know what they’re doing, this does not bode well!