When modifying a cell type, the name field is editable but the new name is discarded. I tried hitting return, using the “next” button to go back to the colony screen, and clicking the other tab in the top left directly, but all forms of interaction discarded the cell type name and restored the name it was created with.
Multicellular cell edits don’t apply unless a “real” change is made. Name change doesn’t count so if you just change the name that gets discarded, but if you change the name and then add an organelle for example that should make the new name stick.