Magento 2 – Cron Jobs Showing Pending Status

You need to select capture option during invoice creation

if you select

Capture Offline When the invoice is submitted, the system does not capture the payment. It is assumed that the payment is captured directly through the gateway, and you no longer have the option to capture this payment through Magento. Invoice status goes to Paid

Capture online When the invoice is submitted, the system captures the payment from the third-party payment gateway like when you charge credit cards using any gateway. Invoice status goes to Pending.

Not Capture When the invoice is submitted, the system does not capture the payment. It is assumed that you will capture the payment through Magento at a later date. There is a Capture button in the completed invoice. Before capturing, you are able to cancel the invoice.

For Reference: https://docs.magento.com/m2/ce/user_guide/sales/invoice-create.html

I hope this will help

Evidently we were having some other issues with the site running out of disk space, so not sure if this caused the issue.

We tidied some logs files up etc. Then went into the cron_schedule table in phpmyadmin and ran the following sql query:

DELETE FROM cron_schedule WHERE status = "running";

This seems to have resolved the issue but we will keep monitoring it just in case.