Marauder Stuck at Lv. 20

Platform: PS4
World: PS4_Beta_7
Character Name: Gelfradus Redsteele (Hyur, Highlander M)
Class/Level: Marauder Lv. 20
Party: Small Raid Party (4)
Frequency: Once but Permanent

Steps:
1. Started Lv. 15 Raid Duty (Main Story Quest: "It Must Be Pirates" or similar)
2. Died a whole lot because we didn't have a healer.
3. Reached Lv. 20 (synced to Lv. 18)while dieing a whole lot.
5. Left the Duty to find a better party.
4. After some time, I realized that I could not receive anymore EXP specifically for the Marauder class. All my other classes could level up like normal.
5. Tried doing quests and killing monsters, but to no avail.
6. Tried Logging out and in again, but it didn't fix it.

PS4 beta is currently limited to level 20 max.

Whew! Thanks! I thought for sure that something my character was glitched.