Glad I’m not the only one to run into this.
I’ve long since completed the campaign for The War Within. I thought I miss counted how much I actually had turned in. But when I went to verify the count after each turn in, the stack was indeed not shrinking. I started my turn in with 110 in bags (with 2 in my personal bank) and still have 110 after getting 2 Fireflight Rubies. I moved the Odd Glob of Wax stack to a different slot to see if the stack just wasn’t updating, but it still shows 110.
Level 87 - Ketsuekisô - Velen (US Realm)