Top of models missing after slicing with Bambu lab studio

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The images are self explanatory but regardless of what model I try to slice, it would appear the top layer is not slicing properly so the infill is exposed.
I’m new so it could be my imagination but this only seemed to happen after i installed the latest update.
Screenshot by Lightshot (gun)
Screenshot by Lightshot (RC plane wheel"
Screenshot by Lightshot “Tundra wheel”

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  • Detailed description of the problem
  • Printer model used
  • Slicer settings used
  • Type of filament used
  • Photos that clearly show the problem
  • .3mf file (if the file can be shared)
  • Any potentially useful information that is related to the problem