Not getting exp from maps

I'm currently level 86 and have been running Tier 15 and Tier 16 maps, but I’ve encountered a strange bug where I'm not receiving any experience from them. Normally, I expect to see at least some XP gain, especially when running higher-tier content, but for some reason, my XP bar isn't moving at all in certain maps, no matter how many mobs I kill or how many maps I complete.

This issue seems to happen approximately 1 in every 4 to 5 maps, where I’ll go through an entire map without getting any XP at all. The other maps work just fine, but this intermittent problem is making it really frustrating to level up.

I’ve tried:

Running different Tier 15 and Tier 16 maps.
Using different characters to see if it’s a character-specific issue.
Checking if any of my gear or skills are causing this.
Has anyone else experienced this problem? Is this a known bug, or am I missing something? I'm not dying during the maps, so I’m definitely not losing XP that way.

Yep, I am having the same issue on my level 85 pathfinder. Ive leveled 3 other characters to level 90+ and never had an issue until this character this morning. Ive noticed 4 maps of zero XP.

same thing, hit a wall at 90% lvl 88 on Pathfinder

Same, has it been fixed?

Same thing here. Some maps have literally 0 (zero) exp gain.

If noticed that too. It's already very Little xp that you get after level 96, i get like 1% xp for a map enemies level 80 and nothing for normal T 15 maps enemy level 79. That means i need to complete 100 maps without any death otherwise i'll take forever, change that it's obviously a bad design and all it does is waist peoples time. Please show some consideration to this game breaking negative