Use of CT999 in Siterule for POST-SPLIT

Hi

We use PSN-Split at one step of the router.

for the steps after PSN-split, the former time-based components are not of interest and should be left away, so I wanted to deactivate the siterule CT999 for POST-SPLIT. But unfortunately, this leads to SFC without BOM. Is this reacting as designed?

We use SAP ME 6.0

Kind regards and thanks in advance to any who can answer.

Yvonne