Please note that Bloch BC is not good for braodband simulation:
https://optics.ansys.com/hc/en-us/articles/360034382714-Bloch-boundary-conditions-in-FDTD-and-MODE
https://optics.ansys.com/hc/en-us/articles/1500006417822-Bloch-BCs-in-broadband-sweeps-over-angle-of-incidence
you can use BFAST https://optics.ansys.com/hc/en-us/articles/360034902273-Broadband-Fixed-Angle-Source-Technique-BFAST-
If the incident angle is not very large, say over 70deg.
The larger than 1 result usually is due to autoshutoff min is too large. Please reduce it and do tests. Of course the simulation time should be long enough to ensure the simulation terminates before reaching 100%.
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