In case you can't see the tracks you've liked from a certain artist when accessing their profile via the Artist tab you might be experiencing an issue we're currently aware of. We suggest you go to this Ongoing Issue and add your vote to it by clicking on the +VOTE button. Make sure you follow the steps provided under Status Update as well.
It'll also be useful to subscribe via the three-dots menu in the top right corner next to the title. That'll make sure you stay up to date with any relevant updates about this.
Hope this helps. Let us know if you have any more questions.