WHMCS Plugin link to WHMCS disconnects or "times out" after inactivity

We have noticed that after a certain period of time when there is no traffic to the WHMCS page, the plugin and WHMCS connection is lost despite all settings being correct on the dashboard.

This is a big issue because if there are clients who wish to signup with their domain are presented with a “Sorry there doesn’t seem to be a WHMCS install” page, that is terrible for user experience.

After several forced-refreshes the page comes up again, but we don’t expect normal users or clients to do the same.

I have attached a file for your review.

Thank you,