[NTG-context] square in Cambria font

I find an anomaly in the typesetting of $\square$ in the Cambria font. The $\square$ is significantly smaller then the corresponding filled squares like $\boxtimes$, etc. Is this intrinsic to the Cambria font? Or is some encoding wrong? I tried lmodern and lucidaot and both give squares of the same size. See the example below. Hans van der Meer \setuppapersize[A6][A6] \setupbodyfont[cambria,10pt] % TOO SMALL %\setupbodyfont[lmodern,10pt] % OK %\setupbodyfont[lucidaot,10pt] % OK \starttext $\square$ \string\square\crlf $\boxdot$ \string\boxdot\crlf $\boxplus$ \string\boxplus\crlf $\boxtimes$ \string\boxtimes\crlf $\boxminus$ \string\boxminus\crlf \stoptext