Hi Harry,
Thanks for contacting Syncfusion Forums.
QUERY: Data not collapsing in TreeGrid
We have validated your query. We are unable to reproduce the reported issue at our end in the specified version. But the reported issue reproduces in version 17.2.51. This issue has been fixed and the fix will be rolled out in Volume 3 Beta Release which is expected to be rolled out tomorrow.
Till then we appreciate your patience.
Regards,
Padmavathy Kamalanathan