What is the proper way to get Puppeteer to authenticate to a NordVPN SSL proxy?

[CyberBotX]

I'm running into a weird issue lately with PuppeteerSharp since updating from 7.1.0 to 9.1.0. I have PuppeteerSharp connect to a NordVPN SSL proxy by passing --proxy-server=https://<nordvpn-server>:89 to the args when launching the Browser object. I'd later call AuthenticateAsync on the Page object I'd get from the browser, as everything I've read says that is what you need to do (or rather, everything I've read says that for the Node.js version of Puppeteer, you need to call the authenticate function, so I assumed the same needed to be done with PuppeteerSharp).

With 7.1.0 this was working just fine. But I am not sure if this works with 9.1.0 anymore. More often than not, I seem to get a page that is still waiting for proxy authentication. Sometimes this happens even before I have a chance to navigate to a page with GoToAsync, sometimes it happens on the first call to GoToAsync, but it has been causing my calls to ScreenshotDataAsync to never return, I assume because Chrome is unable to reply to the Page.captureScreenshot method while waiting for proxy authentication.

I was going to file a bug for ScreenshotDataAsync never returning, but that was before I noticed that it could be because of the proxy authentication being needed. So before I even submit a bug, I'd like to know if what I'm doing to authenticate to a NordVPN SSL proxy is correct or if I should be doing it another way.