PSI intermittently attributes unrelated URL request to first-party script in Network Dependency Tree

FAQ

• Yes, my issue is not about variability or throttling.
• Yes, my issue is not about a specific accessibility audit (file with axe-core instead).
• Yes, my issue is not answered by other FAQs.

URL

https://webmate.me

What happened?

Network Dependancy Tree intermitently shows random unrealted URLS like:

https://bzr.openai.com/v1/sdk/events? (attributed beneath https://webmate.me/wp-content/cache/asset-cleanup/one/js/head-....js)

https://widget.me-talk.ru/comet/longPolling?orgId=2ed4dd2590ddc18ccc480451ff564d2b&siteId=0al9ryskm9dnwvawvzwjr00p0a5mxro2&clientId=lE6s2tkDPbWgZf2n3bTqJdT8BiQeP1kw&time=1788993111078&r=1788993537651&json=1

https://bam.nr-data.net/jserrors/1/fbf682035d?a=1052038940&v=1.321.0&to=MVNUMhFYDENTBURcVwgZdwUXUA1eHSdARWQlWVgSEVYOXFcUbGJdBGphDwdeB0RxCV5BSglaWgMRA1hDWglHdEoDVw%3D%3D&rst=182351&s=89963832a4bac73e&ref=https://www.ecotradegroup.com/pt/carbrand/volkswagen&ptid=56184c4a4d4ab882

Seems to have different URLS in there every 10-25 runs. It's not any malware or plugins on my site or in my hosting environment that I can see, and other users are reporting the same issue on reddit (https://www.reddit.com/r/webdev/comments/1w9ahxv/pagespeed_phantom_domain/?sort=new)

They all seem to consume exactly 4500ms (and hence add 4.5seconds to LCP)

What did you expect?

there not to be a random URL in the network dependancy tree.

What have you tried?

Full wordfence malware scan, pattern searches in text and database on my site, same runs via Catchpoint's speed and lighthouse tests with no anomalies over 30 or so runs, uploaded all site files to ChatGPT Astra High for analysis and all came back clear.

How were you running Lighthouse?

PageSpeed Insights

Lighthouse Version

151.0.7922.71

Chrome Version

No response

Node Version

No response

OS

Mac

Relevant log output