After entering the Mermaid Kingdom and beginning to talk to the mermaids, they will repeat dialogue from previous interactions. For instance, after the cutscene before you enter the deep sea and you are given the stamina fruit, the last line is something along the lives of "Stay safe." When I tried to interact with the rancher merman for the first time, instade of an introduction i got the same stay safe message. This same issue has also occurred with Pablo and Semeru's lines if I talked to them before meeting a new mermaid.
Game Version 1.1-1223
I first encountered the issue around mid to late Summer, the most recent was Fall 6 Year 1.
Platform Steam
Input Mode: Keyboard + Mouse