diff --git a/public/app/plugins/panel/canvas/globalStyles.ts b/public/app/plugins/panel/canvas/globalStyles.ts
index dca18e3837c..29ea977d2d2 100644
--- a/public/app/plugins/panel/canvas/globalStyles.ts
+++ b/public/app/plugins/panel/canvas/globalStyles.ts
@@ -89,6 +89,7 @@ export function getGlobalStyles(theme: GrafanaTheme2) {
           },
         },
         span: {
+          height: '100%',
           '&.rc-tree-checkbox, &.rc-tree-iconEle': {
             display: 'inline-block',
             width: '16px',