So need some help here. My city is at 3k pop, and ever since hitting about 2k o have had issues with massively fluctuating pop levels. I will go from 100 extra laborers to -200 or more within a season. At first it was due to lack of food which I fixed, now it seems to be due to lack of produced goods?

Problem is whenever I think I stabilize the situation I get immigrants which immediately demand more finished products for houses which depletes the supply of goods and then crashes the population back. But if I increase good production it is the expense of food surplus which also determines immigration and I have the same problem. I’m not entirely sure what to do to fix this so any advice is appreciated!