Hi @rene_audet​ 

Can you confirm if you are using FME Workbench or FME QuickTranslator?

Under Reader parameter --> Which group by option are you currently using? i.e. LayerName, Geometry or Attribute Schema

Please feel free to browse our CAD translation articles.

Take a look at this post from earlier this year: How to add the same features to multiple zoom levels in MBTiles (MVT) writer? (safe.com)

Especially the answer by @Mark Stoakes​ . There currently are limitations in the vector tile writer.