Problem with resistance

[grapper]

Last night my group was fighting a wraith and it seems that the resistance was behaving sort of wonky

[TURN] Ruby Shadowsong - [AC: 3; mage armor]
Ruby Shadowsong: [CAST] Melf's Acid Arrow [at Wraith]
Ruby Shadowsong: [ATTACK (R)] Melf's Acid Arrow [1d20+6 = 26]
Attack [26] -> [at Wraith] [CRITICAL HIT]
Ruby Shadowsong: [DAMAGE] Melf's Acid Arrow [CRITICAL] [TYPE: acid (8d4=20)] [4d4+4g4 = 20]
Damage [10] -> [to Wraith] [PARTIALLY RESISTED] [HEAVY]
Effect ['DMGO: 2d4 acid'] [D:1] -> [to Wraith] [by Ruby Shadowsong]

[TURN] Wraith - [DMGO: 2d4 acid; [D: 1]]
GM: [DAMAGE] Ongoing damage [2d4 = 4]
Damage [4] -> [to Wraith]

The wizard hit the wraith with Melf's Acid Arrow. The damage was correctly resisted, but then the ongoing damage applied fully when it came to the wraith's turn. I don't think that is correct, or is ongoing damage not supposed to be resistible?.

[Skellan]

Hmm yeah. Perhaps a a work around you could reduce the ongoing DMG by the resistance? Not sure if that would work