This was resolved in version 0.10.24 - 12th December 2022

Impacts version 0.9.30

Some players may have experienced an issue where the merge board appears blank after upgrading to 0.9.30

We’ve been investigating this issue and our engineers have now found a fix that has been rolled out. Please upgrade to version 0.10.24 or higher. For help updating the app, please refer to How do I update my game?

We’re sorry for the inconvenience and thank you for your patience.