Shopping cart shows empty

If this has been answered elsewhere my apologies, I've searched a good bit.

I have OC 3.0.3.2 relatively freshly installed in a subdomain on a shared server with no modified core files.
I'm using the iStore OC compliant theme and have installed just a couple extensions, I believe none of which should affect the shopping cart.
I've checked the Events, all there and active.

My issue is this (at the very least) when I add a product to the shopping cart from a product page it shows the cart count increase by 1, then I press the back button on the browser (tried on Chrome, Edge, and Safari) the cart shows empty (0), then I refresh the browser screen and now my product is back in the cart.

I haven't explored all the possible situations the cart contents display incorrectly but I'm willing if the added info would help diagnose the issue.

I'm really new to Opencart and I know just enough to be dangerous generally speaking so I graciously thank you in advance for any help offered!

Cheers!

patchonaiew wrote: ↑

Mon Jan 20, 2020 9:22 am

My issue is this (at the very least) when I add a product to the shopping cart from a product page it shows the cart count increase by 1, then I press the back button on the browser (tried on Chrome, Edge, and Safari) the cart shows empty (0), then I refresh the browser screen and now my product is back in the cart.
Cheers!

This is the browser behavior, nothing related to Opencart.

that is a browser cache issue, wrong expire headers.

As above, usually when you press the back button the browser doesn't re-load the page but shows you what it saw before the item was in the cart.

This is probably caused by a bug introduced in version 3 in that the cache control headers are not set in the response.
https://github.com/opencart/opencart/issues/7008

Try adding the cache control header as described here.
viewtopic.php?f=201&t=207498#p737430

ADD Creative wrote: ↑

Tue Jan 21, 2020 1:07 am

This is probably caused by a bug introduced in version 3 in that the cache control headers are not set in the response.
https://github.com/opencart/opencart/issues/7008

Try adding the cache control header as described here.
viewtopic.php?f=201&t=207498#p737430

You are absolutely correct.

Thanks for the many responses and I apologize for my delayed message, I’m on a last minute business trip with little time to attend to personal emails.

When I return home in a few days I will take a look at the cache related issue and suggested fix. I’ll be sure to post the results of the implementation here for others to benefit.

Thanks all for your support!

ADD Creative wrote: ↑

Tue Jan 21, 2020 1:07 am

This is probably caused by a bug introduced in version 3 in that the cache control headers are not set in the response.
https://github.com/opencart/opencart/issues/7008

Try adding the cache control header as described here.
viewtopic.php?f=201&t=207498#p737430

Fixed the issue!

Many thanks community!