Research is once again heading in a negative direction.

Can you attach a save please? From this report alone it's really hard to know what is wrong

https://1drv.ms/u/c/594f86214fc825dc/IQCj70CFyBIES6-32H00s6S7AV6JbO90aVJ344vlIFJcD6A?e=Thw1z8 U3 Already sent via Zuff to Filip. U4.1 https://1drv.ms/u/c/594f86214fc825dc/IQCDXLcHQ2dCSqaDZ-lpDobFAVUD3OtFcxgOxX17o0DcBjo?e=maFTAN

WARNING: This is not a sandbox save file and no cheating has occurred. only your Mod and Train DLC and my Time.

If your population is over 420k-ish then the population science buff exceeds 2147% and overflows to negative

That is true, we are investigating the best possible fix.

Fix will be in next patch

Thanks, it probably didn't affect very many people, so I think it's nice that you fixed it anyway.