Size may vary. It may have different number of black lines but it always work same way and got broken same way. Special coating on sensor getting old and disappear. When it happened there is always RH=20% on weather station display. Why not RH=0%? Because this type of sensors cannot measure RH lower than 20%. Therefore, when it got broken there is ~20% RH on display.
RH Sensor must be replaced to fix the issue.
First RH Sensor is on the mainboard