CC2018 Swatch panel bug
The InDesign CC 2018 swatch panel displays different sets of swatches when set to different view options. “Small name” seems the most complete. Swatches are missing with the other settings especially after opening a document from a previous version of InDesign.
Chris Craig shared this idea
Please try cleaning the preferences and cache once for InDesign 2018. If it doesn't help, please attach the document in which you are able to reproduce the issue as we are not able to see it following the above mentioned steps.