Hello,
I filled this bug report about hordes not getting money https://forum.paradoxplaza.com/foru...wont-get-money-when-razing-provinces.1402087/
It's an easily reproducible bug.
With 1.30 patch looted provinces actually paid off by your own treasury which can be seen in monthly balance. Maybe game considers razing as looting your own treasury right now. I don't know if it is also seen on monthly balance though, its just a guess.
If that is the case money in the conquered provinces should be directly added to treasury even without razing.