This article explains how the no-syn-check and no-sequence-check options behave when multiple logical systems (LSYS) are present in the configuration.

The no-syn-check and no-sequence-check options only apply to the logical system (lsys) where they are configured. Applying these knobs to the root logical system does not propagate the settings to custom logical systems.

Recommendation:
If you have multiple logical systems and need to disable SYN and sequence checks, configure these options individually on each relevant logical system.