stamina won't regenerate in bath house

[vivid sluice]

Title: won't regenerate in bath house
Reproduction Steps: i was playing with my friend, visited the bath house. i stood in the water for multiple minutes but nothing happened, my stamina stayed low
Repro Rate: was my first time visiting the bath house in this save file
In-Game Date & Time: 8pm
Players & Platform: my friend was the host, i was the only one who joined. we play on pc
Game Version: v 1.2 - 1238
Input Mode: Keyboard