Estates stay broke, keeping demand for goods low

[Jean-Quatorze Maxwell]

Hello!
For my first game on 1.3.2, I went for a campaign with Poland. Such a great country with a ton of flavor and cool content.
But i noticed something weird in the 1350's, after the black plague. Usually the tax bases of most countries wil dip a bit everywhere, but it shoots back up eventually. Now in my game, I've noticed plenty of usually very rich European capitals like Venice, Paris, London, Prague, are not only not getting richer, but are having their tax base continually drop, down to 3 or 4 ducats, which is extremely low. Plenty of usually important buildings (stacks of 6 to 7 jewelers for examples) are just flat out closed. I can speak for the finances of the estates in these realms, but my own are all at 0 ducats. It seems my taxes + the upkeep cost of their estates buildings is just way more than their revenues. Even my nobles, which should be stupid rich from my insane RGO'S and high aristo+serfdom build, should be able to buy tons of goods and build plenty of buildings up. in the last few minutes, my burghers have been able to amass about 100 ducats and have even built a road (1) for the first ime in decades. First I thought it was the unique polish law that you get through the radical reforms event, which gives you +10% tax. But litteraly every other coutnry seems to be facing super low internal demand due to poor estates.