Hello,

If you used two attributes then comma will shown in the cart between the variations and attribute names will not.

Two attributes: https://jmp.sh/Fd6iOTQ

Result: https://jmp.sh/c10owMz

If attributes are three and the third one not used for variation then you add the product to cart then it also show a comma between the two selected variations and attribute names will not shown.

Three attributes but third one not used: https://jmp.sh/cPeCnOf

Result: https://jmp.sh/vPGAIRi

If the third attribute is checked as “Used for variations” and variations added for that attribute also then in the result the comma will not shown the attributes name will be shown in the cart:

Three attributes: https://jmp.sh/NGo7h1d

All three also used variations: https://jmp.sh/zCExuhb

Result: https://jmp.sh/UgArgm4

In your case when you used the only three attributes and did not check the third one for variation it display like this: https://jmp.sh/45h2z8s

Product Setting: https://jmp.sh/PyhNCvn

And this is the normal expected look that the attribute names did not used while using two attributes for variations.Hope you get my point.

Best Regards.