Bulk Item Exchange - Selections under "Items I Have" not persisting after page refresh

Steps to reproduce:
1. Select chisels under "Items I Want" (also occurs with other selections)
2. Select chaos orbs under "Items I Have"
3. Search
4. Observe that results are chisels:chaos
5. Refresh page
6. Observe that results have become chisels:exalts

7. Check Filters > selections under "Items I Have" have been cleared

Notes:
Clicking Search again instead of refreshing the page preserves the "Items I Have" selections.

Additional Info:
Browser: Firefox (61.0b14)
Possibly relevant extensions(?): uBlock Origin, Privacy Badger (both turned off)