This is happening with all kinds of saved data, so I will send you the data right after the start. I am playing in window mode, but the same bug is happening when I start the game in full screen mode.
I suspect that it depends on the PC environment, so I will describe how PC environment.
Save Data Name Sunderland.fm
Windows10 Home/Intel Core i5-9400F/NVIDIA GeForce GTX 1660/1920x1080