Fix an issue with frozen column count and unhiding. (#11929)

* Fix an issue with frozen column count and unhiding.

Unhiding logic should take into account that there can be hidden frozen
columns that are not the column currently getting shown.

1 files changed, 3 insertions, 1 deletions

diff --git a/client/src/main/java/com/vaadin/client/widgets/Grid.java b/client/src/main/java/com/vaadin/client/widgets/Grid.java
index 6a42d3708f..4f13d0ae42 100755
--- a/client/src/main/java/com/vaadin/client/widgets/Grid.java
+++ b/client/src/main/java/com/vaadin/client/widgets/Grid.java
@@ -5336,7 +5336,9 @@ public class Grid<T> extends ResizeComposite implements HasSelectionHandlers<T>,
                     int escalatorFrozenColumns = grid.escalator
                             .getColumnConfiguration().getFrozenColumnCount();
                     if (gridFrozenColumns > escalatorFrozenColumns
-                            && escalatorFrozenColumns == columnIndex) {
+                            && escalatorFrozenColumns == columnIndex
+                            && grid.getColumns()
+                                    .indexOf(this) < gridFrozenColumns) {
                         grid.escalator.getColumnConfiguration()
                                 .setFrozenColumnCount(++escalatorFrozenColumns);
                     }