I'm so confused right now.

I am trying to rename a chart in Excel 2013, but it keeps reverting my names. It looks like there might be a 32 character limit on the name length, but I cannot find any documentation supporting this.

In case it's not clear, I'm trying to rename a chart from Chart38 to "Productivity - Tractors CY/OP - Month", but once I press Enter, it changes back to Chart38. If I can shorten the name to less than 32 chars it seems to work, but that will be nearly impossible for some other charts.

Anyone know what's going on?