Breadcrumb is in the wrong order on every product

[Dmillercamlab]

We have a category stricture as follows
Default>products>Category 1>Sub level 2>sub level 3 >single product

in this example
Default>Products>chemicals>pH solutions > electrode cleaning solutions>single product

Consistently the "products category is listed at the end of the trail
So its
Default>chemicals>pH solutions > electrode cleaning solutions>Products>single product

https://www.camlab.co.uk/electrode-cleaning-solution-pepsin-hcl-removal-of-proteins-500ml

we are running M2.4.3 on cloud but has been an issue since we installed this on 2.2.6, does it on all products and all categories

Any ideas? customer keep clicking the "products" button and it links back to the all products page
Thanks
David