It looks like some players of Stranded Sails: Explorers of the Cursed Islands are running into a corrupted save issue. Thankfully Merge Games is already aware of the problem, and they're investigating to find a fix. Check out their full statement on the bug below.
Please see the following statement regarding the Save Data glitch for Stranded Sails - rest assured we are working on getting a patch out to resolve this issue asap! pic.twitter.com/P4WG6XrTlb— Merge Games (@MergeGamesLtd) October 18, 2019