"Unable to find the object Sys.Browser("chrome")" When Running Several Back to Back Tests

I'll add the additional WaitBrowser property, but it may take some time to confirm whether this fixed the issue or not. Personally, I don't believe it's a coincidence that the following test in the execution plan failed for the same reason, and the last test (where TC is closed/reopened) suddenly starts working again. We've seen this issue several times. Even while developing new tests. 

Thank you for the help.