Right sidebar not showing on 'default' woocommerce productpages

Dear guys

I have a problem with showing the right sidebar on the ‘default’ woocommerce product pages.

It shows on the ‘default’ shop-page, on ‘default’ categori pages and on product pages were I have used ALM to make a custom layout. But just not on ‘default’ product pages.

I have checked and double and triple cheked all settings, and they should be fine. The widgets (some product gategories) also show up – but not in a sidebar.

So, what could be wrong?

Kind regards, David
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