heat transfered to duplicants not calculated right

Sometimes when duplicant steped into very cold Crude Oil and runing Manual Generator, the heat flow number between the duplicant and "environment" seems to be wrong. The following 2 screenshot (compounded for simplicity) have two duplicants, Nisbet on the left, has body temperature 10.7℃, stepped in -37.7℃ oil, and is losing heat -9.99 kDTU/s. Burt on the right, has body temperature 20.9℃, stepp in -37.2℃ oil, is losing heat -136.83 DTU/s (NOT kDTU/s). (The duplicants are both in Cool Vest). Since Nisbet has temperature difference (10.7 - (-37.7) = 48.4) smaller than Burt (20.9 - (-37.2) = 58.1), it shall lose temperature slower, but it is not.

Save and load the game would re-calculate it right. Actually after loading the save, heat flow on Burt changed to about -9 kDTU/s. But with gamplay, this issue would show up again. Sometimes command the duplicant to another place and wait it return would solve issue, but sometimes not.

I have disabled all mods.