Date & Time: 03/15/2018 9:35 AM EST
Frequency: Once
World Name: Adamantoise
Character Name: Selkor Tanyunn
Class/Level: 70 WHM (6 in Eureka)
Party or Solo: Both
Area and Coordinates: Forbidden Land, Eureka

Steps:
1: Left Forbidden Land, Eureka as level 6 after having completed the Lv 5 Magicite quest and partying for some time afterwards.
2: Left via the boat zone line
3: Did a number of events and logged out, logged back in later that evening and did Expert, leveling, and 50/60 roulettes as WAR/WHM
4: Logged out on 03/14/2018 around 12PM EST
5: Logged in on 03/15/2018 around 9 AM EST, ran an unsynced Solm Al solo
6: Went back to Eureka and entered as whm, My level was set to 4 instead of 6 as it should be.