Population doesn't reconcile in annex and release colony scenarios

[andy_bgf]

In 9.1.18 I found that the country doing releasing or annexing inevitably takes a (minor) population hit. All below was done in paused mode right after the sandbox loaded:
Releasing
Sandbox: 2020 World
Main -> released: China->Tibet
Main pop before: 1 325 198 000
Main pop after: 1 256 731 000
Main diff: -68 467 000
Released region pop: 68 171 656
Main loss/gain -295 344

Annexing
Sandbox: 1949 CW
Main -> annexed: USSR->Uzbekistan
Main pop before: 104 159 320
Main pop after: 110 448 792
Main diff 6 289 472
Annexed original pop 6 300 511
Main loss/gain -11 039

Emigration numbers for the main country remained the same pre vs. post.

[Buzzbrad]

I've noticed a bug where population isn't created in rural areas of a map - i.e. it is there only in cities and towns that are actually on the map. This becomes clearly visible with the population map filter enabled. Affected areas as of version 9.1.18 (that I found):

• 1940, 1941, 1942 sandboxes
  • Yugoslavia + north eastern Italy
  • Czechoslovakia + northern Hungary
  • Soviet Union:
    • east Ukraine, Crimea, east Belarus
    • border with Romania
    • All central-asian republics - KAZ, UZB, TKM, KYR, TJK
    • Armenia, Georgia
  • UK - Northern Ireland
  • Pakistan
  • Jordan
  • Kuwait

• 1949 (Cold War):
  • Yugoslavia
  • Italy - Sicily, Sardinia
  • UK - Northern Ireland

• 2017, 2020 (div states, MAGA):
  • Russia - Crimea

1936, 2020 (GC, Shattered World, World) seem to be unaffected by this.

I've also noticed that population of Crimea is below expected - as of 2014 census (source) it stood at 2 284 769 (58% urban, 42% rural). It is around 1.4M in the game in modern sandboxes.