All the Below have been experienced on PC/Steam
Bugs:
Gold Per Turn: 
On multiple occasions experienced a period of 10 turns where I will see all of the following numbers: +4100 GPT, -75000 GPT, +2m GPT, -2m GPT, -100 GPT, +100GPT

Stability:
0% stability on cities when I have 1000 stability more than the minus figures

Graphical:
1. City Tiles no longer display
2. Units no longer display

3. Ground textures no longer display

4. Nuclear bomb still has the wire mesh

5. Many late-game events have not had the text formatted yet so debug text is present

AI

1. AI factions cannot be killed if you stop them from settling in the early game (I tried, but more units randomly spawn next to the killed unit)
2. Humankind difficulty AI is tad broken with insane build speeds (I won a few now but I do not understand how most will do that difficulty, makes Civs immortal difficulty look like easy) 
3. AI breaks eventually only building theatre districts, and I mean only, had 2 continents to take with only theatre districts across the entire area.

Military

1. Planes struggle to rebase to aircraft carriers, I have lost 6 aircraft trying to transfer them over so far, they disappear with no trace. 

2. You can win wars with no possible reward

3. Late game military tree is confusing, you can have modern tanks and medium tanks at the same time when one supersedes the other, this is shared with planes and infantry 

4. Soft lock by enemy never finishing a turn in a battle

Achievements
You can randomly get achievements not relevant to your gameplay

General:
1. Turn Timer hangs and does not proceed to the next turn
2. Game crashes when loading a save.

Balance:

Economy
1. Units cost far too much, done multiple large maps and to get a majority of late-game units you need to control most of the map, most common I only see 4 copper, 3 steel, 3 aluminium, 4 oil, and 4 nuclear material, a lot of units and buildings require all of the planetary wealth of these resources to create on a large map which is illogical 

2. Maps can lack enough resources in multiple areas, I have played a map with not enough global nuclear material/aluminium and oil all at once, 

Science
End game is impossible to reach with standard play due to turn timer, my games always complete while myself and the AI have tech around line infantry, the tech tree is balanced to the game duration for all difficulties

Gameplay Progression
End game cities need to have an option for continuous projects like Civ, for example, in the late game, you will build the public ceremonies every turn, so every 7 turns you will return to a city to repeat this exact process, this makes the core gameplay less entertaining. 

I will update as I experience more issues, do not ask for detailed bug reports, it is my day job and rather not do it at home.