weather symbols in "comparison" not accurate

[spixx]

Hi. it seems to me the (rain) symbols in the comparison screen are not very accurate. i have been noticing this for a few days at least. Please look at the YELLOW: 2clouds + 3 raindrops result in 0 (!) mm rain. below the GREEN has 2 raindrops but results in 2,2mm. and then the RED again has 3 raindrops and 1,9 mm - why less than the GREEN? best regards