Route Art Help Lidar Data Beeing Applied Strangly

Hello,
I have probably made a mistake in the Import Lidar data Process. The result is strange leveled Lidar Data on diffrent heights like many big cubes beeing at the same time detailed in there height:
The yellow selection shows the tiles which are not aligned:


The process:
DGM 25 or DGM 1 from Baden Würtemberg.

Merged to big tiff, then Tiled into smaller tiffs.

Tiffs converted to ASC with "gdal_translate" .

I imported the ASC back into Qgis to very the georeferencing, the big tile is the Merged and the small tiles the reimported ASC files:


In the Editor the process as normal creating tiles with the HGT(SRTM-Data) and secondly the applying the ASC (LIDAR-Data).

In hope that somebody knows how to fix it EtcsLv2.
PS: I have successfully generated the Marburg Map from the Masterclass stream. This was the trying again by myself to learn way which failed.


Image test: