redstone links from Create, when two are placed in the same chunk together, cause lighting to completely break in that chunk when Phosphor is installed.
Note that this image is from a lot of testing and a lot of chunk breaking.

Related: While trying to debug this, I put together this code to reset/resend chunk light. This works fine with Create alone or with Starlight.
This is the case with Phosphor as well, on the first run. On the second run, the client thread gets stuck permanently relighting the chunk, locking up the game.

See Fabricators-of-Create/Create#318 (comment).