I got some problems in using tree mode. For example , I made a tree with one root node and one leaf node in it. I tried to drag the leaf node out of the root node and it works. However, when I dragged the leaf node back into the root node , It doesn't work.
Expanded online code editor panel and enabled rowReorder feature
features : {
rowReorder : true,
And tried the scenario you described.
All seems to be working well.
Any errors in console?
Please check if you used latest version, try to reproduce this in our examples. If not reproducible, please attach runnable test case.