Because you have some of your info hidden, I couldn't see the overall cash list to see which corps might be low on cash. You might want to check this and look at individual corps. I did notice that your unemployment rate is low enough and you have some new corps that take money from you account to establish their initial cash. Check the corps where there is cash transferred to them and see if there are any unusual cash withdrawals that could be triggering a need for you to transfer more cash to them.
Other than this, I don't know. Perhaps someone else may have more info on this.