Has anyone else seen this issue?

I started Peril on Gorgon at level 30. I backtracked to an appropriate save once I figured out the mysterious unpublished secret to actually playing the DLC.

Once I reached 33 (a long while before finishing the DLC), I never gained a single experience point.

My Current XP remained at exactly 85,390 all the way to the end of the DLC (XP Needed to Level: 410,000), even though I finished several quests after that level 33 milestone, including the DLC ending.

I suspect that this has something to do with the level lock of 33.

Any thoughts?

It's because of the level cap. There's no reason for you to gain XP since you've hit the max possible level. 

Same problem here ..

Same issue here. XP is stuck at about 90,000 / 410,000 on level 33.

I'm having the same problem on XB1X except I'm at 36. I haven't finished the last episode of the

main story, but I have finished Peril on Gorgon and I'm almost done with Murder on Eridanos.

My Current  XP and XP needed to level are both at 480,000. I planned to finish the main story

after the DLCs. Maybe the next time I'll finish the main first.