why does SimBrief keep me at cruise level FL240 while the route is valid in upper airspace too? IFPUV accepts e.g. FL380 just fine and prevents flying almost 40 minutes @ FL240…
RAD rule LS4129 limits flights from EDDM (and several nearby airports) to LIMC (and several nearby airports) to FL245- from March to October. It’s possible nobody had time to manually update the restrictions for November - February for that particular city pair.
Regards,
Tim
P.S. some real-world flights even seem to stay at or below FL240 outside of the rule’s validity period: