Interpolating Radio into `md_str` not working

[eahenle]

Sometimes Radio objects interpolated into markdown cells do not behave correctly.

This radio button will respond visually, but will not change the value of var:

md"""
blah blah: $(@bind var Radio(["1" => 1, "2" => 2]))
"""

This radio button works as intended:

md"""
blah blah: 

$(@bind var Radio(["1" => 1, "2" => 2]))
"""

Other interactive objects seem to work fine, only the Radio objects I've noticed doing this.