We were sometimes visiting latest before the request happens, the solution is to wait for the modal to have automatically closed as it indicates the request has finished and the state should be the one we expect.
The PR https://github.com/discourse/discourse/pull/28003 in core
removes the experimental status of new topic bulk actions, we
can now use it for everything from now on. After this and the
core PR is merged we can reintroduce the specs.