An ImgButton returned from ListGrid.createRecordComponent() disappears when hovering over the row

[eschwegs]

ListGrid lg = new ListGrid() {
@Override
protected Canvas createRecordComponent(final ListGridRecord listGridRecord,...

[eschwegs]

I'll try and duplicate this is a paired down example that I can post later this week or next.

[eschwegs]

When I wrap the ImgButton with an HLayout, it remains visible when hovering. The disappearing icon issue was observed by a customer some time after we...