Experience loss?

Time: ~4 P.M. GMT+1
Frequency: Once
World name: Sargatanas
Character name: Mathametic Bloodslash
NPC name: None
Monster name: Grafflas
Class/Level: Gladiator 26
Party or solo: Party, 4 people
In-game time: ~3 P.M. Server time
Area and coordinates: Thousand Maws of Toto-Rak
Steps:
1. I was running a dungeon I entered through Duty Roulette
2. I died a split second before the end-boss died
3. While I saw others in my party levelling up, I received no roulette XP according to my chat log and I see no additional XP in my XP bar even though the Duty Finder says I have received today's reward.
<*Add more steps if necessary>

Connection Specs
- Type of internet connection/provider: UPC Cable
- Modem maker/model number: UPC (Number unknown)