Header Bidding revenue drops to zero after upgrading from 10.12.0 to 10.13.0+

[salvoaranzulla]

Description

After upgrading from Prebid.js 10.12.0 to any later version (tested 10.16.0, 10.19.0), header bidding revenue drops to zero. Reverting to 10.12.0 immediately restores normal revenue.

Environment

• Prebid.js version (working): 10.12.0
• Prebid.js versions (broken): 10.13.0+, 10.16.0, 10.19.0
• CMP: Iubenda (IAB TCF v2.2 compliant)
• Browser: All browsers affected

Live Demo URLs

• ✅ Working (Prebid.js 10.12.0): https://www.aranzulla.it/quale-videocamera-full-hd-comprare-383011.html
• ❌ Broken (Prebid.js 10.19.0): https://www.aranzulla.it/DEBUG-quale-videocamera-full-hd-comprare-383011.html

Prebid Modules Used

"modules": [
  "appnexusBidAdapter",
  "criteoBidAdapter",
  "invibesBidAdapter",
  "ixBidAdapter",
  "pubmaticBidAdapter",
  "rubiconBidAdapter",
  "teadsBidAdapter",
  "consentManagementTcf",
  "currency",
  "criteoIdSystem",
  "id5IdSystem",
  "sharedIdSystem",
  "teadsIdSystem",
  "unifiedIdSystem"
]

Steps to Reproduce

1. Set up Prebid.js 10.12.0 with the modules and configuration above → works correctly, bids are received
2. Upgrade to Prebid.js 10.13.0 or later → revenue drops to zero
3. Downgrade back to 10.12.0 → works again

Timeline

• November 19, 2025: Upgraded from 10.12.0 to 10.16.0
• November 19, 2025: Revenue started declining
• November 20, 2025 onwards: Revenue dropped to near zero
• December 4, 2025: Reverted to 10.12.0 → Revenue restored immediately

[salvoaranzulla]

The issue can be closed.

[coreyb-cbs]

@salvoaranzulla What was the resolution to this? Please provide follow-up as it's always helpful for others who may be experiencing a similar issue -- I'm trying to determine the cause of what looks to be a drop in rev/bids after upgrading from v9.53.1 to v10.19.0.