I have an application which has been in place for almost a year but needed significant changes to a particular report. Using TFS, I branched the project to preserve the original. Once it was branched I updated the project from Syncfusion 15.2460.0.40 (web.config value) to 16.3460.0.17.
Once I had done that I opened the page I needed to modify to test. On this page I have a grid where I have grouping enabled and a default grouped column. When running the page the query would run and the grid would show 254 (for example) rows of data. But the grid was collapsed and didn't show any rows. Also the default grouping column was not displayed on top. I tried dragging a column up to the group bar but nothing would happen.
I deleted the default grouping column and then when running it, all of the datarows were displayed. But I still could not drag and drop and column up to the group bar. I'd drag it up, the grouping bar would expand and I'd see the "ghost" column header there. But as soon as I released it, the column header would disappear the the grouping bar would shrink back down.
So I went back to the original project (v. 15.2460.0.40) and that same page worked just fine.
Been beating my head on the wall for 2 days now trying to figure this out with no luck. Has anyone else run into this?