Project Browser shows strange behaviour

[UKMC]

Hello folks,

in my stack, the project browser shows strange behaviour.
When dragging 1-n object(s) up in the tab hierarchy, 1-n object(s) are sent down to where the up-dragged came.

Example

Before then 7up Expected result real result

1 1 7
2 7 2
3 2 3
4 3 4
5 4 5
6 ... 6
7 1
8 8
9 9
10 10

This happens into a group

Into another group, it works perfect.

Any idea how to fix this ?
Or any alternative how to manage the correct sequence of objects/fields (for tabbing) ?

Best regards for any help


Ulrich