diff --git a/src/javascript/models/transformations/CalculateGlobalStats.jsx b/src/javascript/models/transformations/CalculateGlobalStats.jsx
index 7a2f328..1c8765d 100644
--- a/src/javascript/models/transformations/CalculateGlobalStats.jsx
+++ b/src/javascript/models/transformations/CalculateGlobalStats.jsx
@@ -65,7 +65,7 @@ export default class CalculateGlobalStats extends ToPdfViewTransformation {
         parseResult.content.forEach(page => {
             var lastItemOfMostUsedHeight;
             page.textItems.forEach(item => {
-                if (item.height == mostUsedHeight) {
+                if (item.height == mostUsedHeight && item.text.trim().length > 0) {
                     if (lastItemOfMostUsedHeight && item.y != lastItemOfMostUsedHeight.y) {
                         const distance = lastItemOfMostUsedHeight.y - item.y;
                         if (distance > 0) {
diff --git a/src/javascript/models/transformations/DetectCodeBlocks.jsx b/src/javascript/models/transformations/DetectCodeBlocks.jsx
index cc2431a..75829a6 100644
--- a/src/javascript/models/transformations/DetectCodeBlocks.jsx
+++ b/src/javascript/models/transformations/DetectCodeBlocks.jsx
@@ -68,6 +68,7 @@ export default class DetectCodeBlocks extends ToPdfBlockViewTransformation {
                                     annotation: ADDED_ANNOTATION,
                                     textItems: textCombiner.combine(block.textItems)
                                 });
+                                foundBlocks++;
                             }
                             newBlocks.push(preceedingCodeBlock);
                         } else {