Entering operator in endless mission extraction makes timer vanish

[(XBOX)Tucker D Dawg]

When you are NOT host, go to extraction in survival - extraction timer starts

go to operator - timer vanishes

return to warframe - timer not not there.

Sometimes you can extract when you stay there the full minute, sometimes you are just screwed until the rest of the squad wants to leave.  

Leaving extraction and returning to it doesn't fix the problem.