Hub methods can soft-lock the connection

[rafikiassumani-msft]

Today we detect if you allow parallel hub invocations and throw if you don't when trying to use the feature. This doesn't work if you use IHubContext in the Hub, or if you have multiple waiting results for the same connections Hubs.
This is also especially bad in OnConnectedAsync because that's a special method that runs before the receive loop starts, we need to throw/unblock/warn etc. for this

[ghost]

Thanks for contacting us.

We're moving this issue to the .NET 7 Planning milestone for future evaluation / consideration. We would like to keep this around to collect more feedback, which can help us with prioritizing this work. We will re-evaluate this issue, during our next planning meeting(s).
If we later determine, that the issue has no community involvement, or it's very rare and low-impact issue, we will close it - so that the team can focus on more important and high impact issues.
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[BrennanConroy]

The biggest issue with this is resolved.

What remains is using an injected IHubContext<THub> in the Hub can still cause issues.