Got through to Partner Support via phone super quick! Turns out I started using that poll block the final month it was even available, and it's now discontinued but still able to be copied. There's a known (intermittent) glitch just as I described. I can use the heat map reliably to keep track of poll results, and in the future I will remove that old poll block and use the new feedback block instead. I should be able to edit the feedback block from month to month after copying without issue! Thanks for chiming in, @William_A - much appreciated! ... View more