Hreflang tags working for some pages but not other

Hi

We have our site set up with multiple country subdirectories. We have hreflang tags on all of the sites. It is mostly working OK but in some regions, the UK or .com pages are displaying instead of the local Canada/Ireland versions. We know it is all set up correctly as it's working for 80% of the pages. Our website agency has also confirmed it is all correctly set up.

Does anyone know why the wrong pages might be displaying for some of our keywords? It is only happening for a few...

Hreflang tags working for some pages but not other

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