Charts acting strange after 6.5 Upgrade
Using Jamroom
The issue in this case was the charts run on the daily mantanence, so just after midnight on the 17th the charts were being calculated, but they were being calculate for the 15th. The result was that there was no data for the 16th and the 1 day charts wanted that info.
What changed was that instead of calculating for the previous day they now calculate for the actual day 17th. Give it a day and it should come right.
If you want something to check, check that data is being recorded in the 'charts_history' table. The 'chart_date' is in the format YYYYMMDD so 2020 05 22 would be 20200522.
Check that each day that column is getting new data into it.
ACP -> DEVELOPER TOOLS -> TOOLS -> DATABASE ADMIN -> jr_charts_history
(click the SELECT button to see the table, then click on chart_date a couple of times until the newest shows at the top)