Please confirm if there is a checkmark next to "Data as percentage" or "Data as an actual count" when you clicked them.
If there is a checkmark that means the percentage will show in the chart, otherwise not show.
Usually, the checkmart for the two option is shown default.
If there isn't the checkmark now, you can click the option again, then the checkmark will show and you will see the percentage or count in the chart again.
Hope it helps.
Now I am looking at your problem.
I will deliver the issue to engineering team and will post an update when I have more information.
In your case, a choice item on one likert column occupies a small proportion, then the percentage and count can’t be displayed on report chart. It is because of there isn’t enough space on the chart to show the percentage and count.
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