Strange. Physical problem ?
NoobsDeSroobs reproduced this with Google IME.
I tested.
I created a blank project and BPActorClass,added CubeComponent,
place that on the level ,set Cube(inherited)'s roll 45 using Google Japanese IME. Crashed.
I input degrees directly. didn’t translate Japanese into Arabic numerals.
maybe not needed but
I use Lenovo laptop for Japanese,intel Core i5,HDgraphics4000,Windows10,