🐛 Using "excludedActivityUrls" removes resources from view event in RUM

[konradkierus]

Describe the bug
I'm not sure if it's a bug or expected behaviour. I will understand if it's a feature request instead.

Our app, which is SPA, uses some "comet" techniques (that is, streaming or long polling) and we noticed such requests can affect loading time metric (view.loading_time) in RUM.
As described in the docs here loading time is calculated based on page activity.
Our plan was to use excludedActivityUrls to stop affecting views' loading time with "comet"-like requests.
The problem is that excludedActivityUrls removes also resource entries for such requests and they are no longer visible in VIEW event in RUM. It means there is no longer way to monitor these resources performance, for example, if/when request started, possible network errors, possible retries/reconnections and so on.

Expected behavior
Resources should be visible in RUM even if excludedActivityUrls is used.