Thanks for posting the photos. The interesting takeaway I learned a while ago, that while "larger number" switches, like R5 are more "gentle" in terms of curvature, the more "gentle angle" of the frog, means the throat (the open area swallowing your skates) is a bigger "hole"..
This is because since it is longer, that open area is longer. Combined with the typical lax tolerances of LGB and other "toy like" wheels and track means you have this issue.
Tighter tolerances, like the G1MRA or NMRA (not the toy train standard) minimize this issue. Also as mentioned before, a "flange bearing" design helps stop the WHEELS from dropping into the frog throat.
BUT, there's little to help the skates, which have no flanges to stop them from dropping below rail head height.
That's another reason I remove skates whenever I can.
Greg