I raised the monthly budget for this app from $1300 to $2000 during July, but the campaign stopped once it reached $1303.84 around July 21st.
I understand that lowering the budget should only apply in the following month, so why did the campaign stop even though there was roughly $700 left for the month?
The issue is that the system spent the initial budget within three weeks as if it was using the new budget, so I don't have ads showing for the remainder of the month.
The CPI is set at $5.60 per recommendation, and the average CPI is $1.28, so I don't think the issue is that the bid is not high enough.