I can recreate your findings. I also assume that by SVPWM1 you're referring to the first option in the 3-Phase Index-Based modulation component, DPWM0.
If we look at the zero sequence injection shown in the component's help for DPWM0, we can see that the zero sequence injection is phase shifted relative to the fundamental by 30 degrees. I suspect this is the reason why the loss profile is also shifted for this modulation scheme, as if the current peak occurs during the max/min duty cycle, then there will be less switching losses.
Two of the papers referenced in the demo model (copied below) show the derivation of the theoretical loss profile for different modulation schemes. I would expect a theoretical analysis of the topic will reveal a similar shift in the loss profile.
E. Serban, C. Pondiche, and M. Ordonez, “Power-loss analysis in 3-level TNPC inverters: Modulation eﬀects,” in 2017 IEEE Energy Conversion Congress and Exposition (ECCE), Cincinnati, OH, 2017, pp. 490-497. Click to access online: IEEE Xplore webpage.
E. Serban, C. Pondiche and M. Ordonez, “Modulation Eﬀects on Power-Loss and Leakage Current in Three-Phase Solar Inverters,” in IEEE Transactions on Energy Conversion, vol. 34, no. 1, pp. 339-350, March 2019. Click to access online: IEEE Xplore webpage.