Some products missing the REVIEW tab

Hi,
I installed the plugin in my website and works fine at backend. But review tab are missing in some product page such as in
https://casegalaxy.com.au/product/mercury-goospery-blue-moon-diary-flip-wallet-case-for-iphone-xr
https://casegalaxy.com.au/product/mercury-goospery-blue-moon-flip-wallet-case-for-iphone-xr/
In some page, the review tab works fine such as in https://casegalaxy.com.au/product/apple-iphone-xr-6-1-heavy-duty-anti-scratch-triangle-series-thin-case-cover/

Can you check it for me? Does it has setting problem? Thanks
John