Fix special case for reconnect without activate

[mregen]

Proposed changes

• Due to a race condition the channel may never reconnect
• Remove a session.dispose in keep alive which caused flaky tests as a side effect

Related Issues

• Fixes #

Types of changes

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• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] Enhancement (non-breaking change which adds functionality)
• [ ] Test enhancement (non-breaking change to increase test coverage)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected, requires version increase of Nuget packages)
• [ ] Documentation Update (if none of the other choices apply)

Checklist

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• [x] I have read the CONTRIBUTING doc.
• [x] I have signed the CLA.
• [ ] I ran tests locally with my changes, all passed.
• [ ] I fixed all failing tests in the CI pipelines.
• [ ] I fixed all introduced issues with CodeQL and LGTM.
• [ ] I have added tests that prove my fix is effective or that my feature works and increased code coverage.
• [ ] I have added necessary documentation (if appropriate).
• [ ] Any dependent changes have been merged and published in downstream modules.

Further comments

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 54.49%. Comparing base (ebf8f62) to head (864f596). Report is 4 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2643 +/- ## ========================================== - Coverage 54.51% 54.49% -0.02% ========================================== Files 343 343 Lines 65270 65359 +89 Branches 13365 13380 +15 ========================================== + Hits 35581 35618 +37 - Misses 25809 25854 +45 - Partials 3880 3887 +7 ```

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