Weird oscillatory behavior for temperature

[YodaEmbedding]

analyse-gamma seems to return odd temperature readings. See graph:

(We expect a straight line.)

Testing script used:

#!/bin/bash -i

redshift -x

echo "Actual,Measured" > gamma_test.csv

for x in {1000..25000}
do
	redshift -O $x
	temp=$(analyse-gamma | grep temperature: | grep -oP "\d+" -m 1)
	echo "$x	$temp"
	echo "$x,$temp" >> gamma_test.csv
done

Raw data:
https://pastebin.com/raw/WhBqP18K

[maandree]

This behaviour is also seen when using blueshift with the same colour temperature table as analyse-gamma.