Random issue with product listing layout

[EvanGR]

Hello,

I have a problem with product listings, when going into a category to see a list of products.

Sometimes, when selecting a different page (from pagination), the following is attached to the URL

?tmpl=component&format=html&dynamic=1&start=0

This is random, it doesn't happen always. And it messes up the page layout.

How do I troubleshoot/fix this?

Thanks

J 3.9.19/VM3.8.2 10325

EDIT: It seems the parameter tmpl=component is the cause for the bad page layout.