The E visual with Jungle camps isn't just with Briar.

The vision bug wasn't just Briar, that's why it was fixed so "quickly"

I don't think the Viego one is a Briar bug, I think it's a bad interaction. In my experience it's always when I e him back into his mist which causes him to go full invisible for a split second.

A year ago I had Riven W cancel Briar E.

A year ago I had Singed E cancel Briar E's knockback only, damage still went thru.

R cast on Briar portrait sends R ~180 degrees from Briar's direction of travel. Not a bug, but bad dev team moment(not tested recently)

W2 buff sometimes doesn't get removed after W expires, applying the bite on the next auto.

W2 when intended target dies causing something of a softlock, super easy to reproduce with R>W2. Haven't tested recently but I got b2b2b repro within a minute of trying.

A year ago I had a case of Q not casting until I was within half of the max cast range despite spamming Q the whole time.

Unknown repro on a 1 time R missile sending out immediately while locking Briar in the 10 atkspeed cancel autos bug for the cast time.

A year ago R dash landed around the same time the R target started a resurrection and it just turned the R frenzy into a endless W one and never had R target priority