Change flare colors back or add a new one
There is essentially no benefit to changing the color of the flares. Actually, I think it is less appropriate now because the color of the flares don't reflect as accurately how common those traces are and how many field guides you receive. But the worst result is that there is no way to tell the difference between the prior emergency and severe traces unless you click on it. It's only worth it to use trace charm on the emergency level traces so to remedy how about adding a new color to distinguish them?
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Comments
Its a known bug they're working upon.
https://community.harrypotterwizardsunite.com/en/discussion/10405/visual-issues-with-trace-beam-effects-and-encounter-threat-level-after-the-2-15-0-update#latest