c.childNodes is undefined in TreeGrid after updateFromXML

My Treegrid works fine for a couple of months. Now i wanted to introduce some performance improvements and started to use .updateFromXML.

That also works fine, but now i’m experiencing the following error when traversing through the tree using a loop with .getAllSubItems :

This error happens reproducible only after .updateFromXML was called.

Any ideas what happens there?

Version is v.2.5 build 91111


Unfortunately issue can’t be reconstructed locally.
If issue still occurs for you - please provide any kind of sample or demo link where it can be reconstructed.