https://support.seaofthieves.com/hc/en-gb/articles/360009032593-Bug-Losing-company-progress
Blaze said in [Bug: Losing company & Athena Progress]
The team are aware of an issue in which players have lost the ability to see how far they have progressed within a given level, we are aiming to have this fixed in the next game update.
Rest assured your progress within each Company, including Athena, is not lost, players can continue to play and your level will increase once you have fulfilled the XP level requirement for the given Company rank as normal.
Note: You will be able to see your updated progress briefly each time you hand in a treasure item.