Hey there @dark_raven999 - welcome to Discussions! I am sorry to hear that your river map clues counter has reset to 0/1, despite you having collected the relevant clues.
Are you able to provide screenshots or a short video clip showing the affected rivers, as well as your possession of the relevant clues? We previously received a report of this issue persisting after TU 1.2.2 however we haven't received any since then, so it would be helpful for us to gather additional evidence and information for the development team to reference.
Can you also let me know whether this issue persists across all of your save files, and if reinstalling the game makes any difference? Thank you, and let me know if you need any additional assistance in the meantime!