Refractometer stuck at 20c?

[Notsolostfish]

My new brs refractometer. I calibrated it with the solution. But for some reason its stuck at 20c. When i look through it. My tank temp is 25c. My other refractometer change temperature and i can see it. That temperature stuck is affecting the reading of my salinity. Why is it stuck? Im leaving it few mind to adjust temp top

 

[Tathamet]

Never used this Refractometer or one that shows temp but I’d assume the temp is the reading of the Refractometer (probably room temperature) and not the water.