Lost exp in Eureka

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Date & Time: 3/15/2018 @2300 EST
Frequency: First time
World name: Goblin
Character name: Syverce Beleren
Class/Level: Summoner/70/elemental level WAS 8, reduced to 5
Party or solo: solo
Steps:
1. Level in Eureka
2. Exit
3. Enter Eureka
4. You may have lost EXP
NOTE: This exp loss bug did not happen until I entered Eureka after dying several times during attempts at Sigmascape. Related?