[Rendar]

Whenever you cast Sanctuary < or someone in party does > and you attempt to cast Sear within the area, the spell just fizzles and no damage is dealt, nor are tiles left behind. It seems that the damage from SEAR is proc'd whenever the sear tiles are dropped in the area, which isn't possible with Sanctuary.

[Ranylyn]

1) Confirming this happens outside the arena; happened in 2-man PVE.

2) I would not be surprised if it's not a bug. Considering Sear's very effect is supposed to represent a swirling firestorm in an area, and sanctuary would prevent special lasting effects, aka that firestorm, from happening in the first place... yeah.

[Neus]

Not quite, but there was an issue where Sear would fail to deal damage if it couldn't place sear tiles down. This has been corrected.