KDE: Desktop Symbols reordered after boot.

On my asus laptop with KDE 5.8.3 the desktop symbols are often reorderer after boot. I’ve already locked widgets and symbols on the workarea but that did not made things better.
Any suggestions how to avoid this behaviour? Thanks Tobias.

No ideas? Somehow kde do not remember the position of symbols on the workspace and reorders in rows after boot. A bit annoying.