A while ago a have posted a message about \max not working as expected
when one has

\setupbodyfont[ams]

in the document. For example the following code

\setupbodyfont[ams]

\starttext
$x = \max \{y: y\in A\}$
\stoptext

Does not print a "max" after "x=" but prints "{y : y\in A}"  at a
smaller size. I am attaching the pdf output and the log file. What is the
problem and how can I solve it. 

Thanks,

Tar{\i}k