I setup the cronjob in Magento 2.1.7 but I got an unexpected result. All the indexer were updated except Product category an Category product when I add a new product.
Check in the cron_schedule table, but no exception found i.e, all the crons are updated succesfully.
Newly added product is not showing in category not in search. Cron has not throwing any error.
When I run the indexer manually then all product is shown.