Forked lightning lost its forks.
 

Well sometimes, that is. I swear this is an intentional nerf, but it could also be a mess-up due to the lightning-wall nerf.

Casting forked lightning produces random forking instances of lightning at a 45 degree angle, and usually, there's the main fork that splits off twice, and the secondary which splits off once.

In this instance, the main fork only splits off once, creating the secondary fork, which also splits off.
Usually the main fork would travel much longer, but it does not.

Is there a mechanic behind this? Can my Wisdom levels allow me to produce more forks at a higher rate? Or simply a random thing.

Or is it a bug?

Also: multiple magic runes of lightning or forked lightning do not produce the beam of lightning they used to.
If more than one is activated at a time, the produced lightning will be cut short by multiple instances, causing the rune to produce only a single cell of lightning.

Also also: Any sort of "beam" mechanic magic that is placed in a magic rune is also limited. Tested with steambolt

Could be because of limiting the amount of lightning being produced by lightning walls.