Using the following code with the first two columns frozen (second of which is a composite column):
Note that it appears that only the first column is frozen:
Scrolling horizontally confirms this:
Honestly not sure if this is a bug or a feature request, but I believe it's a reasonable expectation that when the root column of a composite column is frozen, then the entire group should freeze in place.
Sample code attached:
RadzenTesting.zip (193.1 KB)