CK II - Income tooltip shows zero when income is positive - 3.1.0 (KKAD)

[RestedPandy]

One line summary of your issue
Income tooltip shows zero when income is positive - 3.1.0 (KKAD)

Game Version
3.1.0 (KKAD)

What expansions do you have installed?
All of the above

Do you have mods enabled?
No

Please explain your issue is in as much detail as possible.
Income suddenly stopped displaying in tooltip on top bar. Monthly income shows as 0.00 when hovering over income.

Income does still seem to be increasing by the correct amount under realm summary but the hover tooltip shows zero income (see screenshot). Closed and re-opened game, no change.

Last major thing that happened was ruler received celibate modifier from event decision in January (now March). Also conquered a province (Tir Eoghain) just before it but don't recall having checked monthly income since then so could be related.

Steps to reproduce the issue.
See Description. Seemed to happen after ruler event in January (not sure event ID). Event options were 4 choices if it helps narrow it down.
1. gain celibate
2. Gain stressed
3. Gain stressed, depressed chance
4. gain wroth

Upload Attachment

 

[RestedPandy]

Update:

Seems to be related to if you have zero monthly expenses (I'm tribal ruler very early game so no maintenance or paid retinues - retinue is prestige cost one only so far). I had no armies raised at the time so tried raising my realm levies to see if that helped clear it.

Once raised and a month passed with them as an expense (pushed it into a negative monthly balance if that helps) the tooltip started showing correct balance updates again.

Dismissed levies and so far still seems to be working after several months have gone past with zero expenses again.

If the balance increases positively before I raised the levies it is still an issue (I had a marketplace complete just after I resumed the game which is what gave me the idea to see if causing an expense fixed it)