[OpenSIPS-Users] INVITE brings in extra transport=UDP parameter

[Saint Michael]

INVITE sip:19206661392 at 38.95.11.250;transport=UDP
when this happens, opensips has a contaminated ru variable
and since it's read-only, I cannot fix it in code
I tried
if ($ru =~ ";transport=UDP") {
         $ru = $(ru{s.select,0,-13});
but it makes no difference, ru does not change
How do I get around this?