The PDF is produced, but the problem is log spam and the fact that some CDP events are not decoded correctly on the Go side.
2026/04/27 09:28:00.170044 received report request from 1.2.3.4.0:49562 2026/04/27 09:28:01 ERROR: could not unmarshal event: unknown PrivateNetworkRequestPolicy value: PermissionBlock 2026/04/27 09:28:01 ERROR: could not unmarshal event: unknown PrivateNetworkRequestPolicy value: PermissionBlock 2026/04/27 09:28:01 ERROR: could not unmarshal event: unknown PrivateNetworkRequestPolicy value: PermissionBlock
It is related to old chromedp and cdproto.