This is release 1.10 of the Search API module, containing several bug fixes and new features.
Furthermore, if you are using the “Content access” processor, it would be great if you could go to #2948707: ContentAccess processor fails to account for all grant records and test the latest patch there, to make sure it doesn’t break any existing setups (and, in case you have some non-standard node access setup, to maybe confirm it improves support for those as well).
Thanks!