Issue Summary

The Pull request does't show “Changes since last review” option if Pull request has had a merge commit or destructive force push since your last review.

This is documented as known limitation on the community post.

Expected Results

“Changes since last review” option is available to use

Actual Results

“Changes since last review” option is grayed out

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available