Thank you for contacting us.
Further details will be required to assist you. Please share what are the actions you perform and what is your expected result.
RecycleBrowser was tested and works as expected - executing all tests from a list in the desired sequence in the same browser instance. Please note, that if any of the tests is explicitly set to use browser different than the one used to execute the list, this would bother the RecycleBrowser option and will start the explicitly set browser for the respective test.
If you continue experience any troubles using this feature it would be really helpful if you could provide your project for the purposes of the investigation.
Hope to hear from you soon.