Of course we do.
If it was not full time, then it's play on and Tigers play the ball, tackle 2. Why else did the ref stop play? He didn't rule a penalty. If he in fact ruled a penalty, then Tigers would have had the right of challenge (noting of course the bunker would have denied the challenge, but making the point that Cowboys had no right to challenge).
Otherwise the argument is, one of two diabolical outcomes:
(1) Refs allowed a captain's challenge when there was no stoppage in play.
This is clearly and blatantly against the rules, and I guarantee they will continue to NOT permit challenges in open play for the rest of the season.
They made exactly these clarifications back in April when Toby Sexton gave away an intentional penalty to challenge a missed knock-on, which the referee allowed, then Annesley released a ruling that this was an incorrect application of the rule and that players cannot intentionally force breaks in play to compel a captain's challenge on a play-on ruling.
(2) Or even worse: that the bunker intervened in the millisecond prior to FT, to cause the referee to halt play, which then permitted Townsend the opportunity to challenge a call which the bunker had already intimated that it would give.
In other words, the NRL may attempt to argue that the stoppage in play was caused by the ref on behalf of the bunker. This is still not the way the rule is written, and again per above, if the referee or bunker sought to intervene on an illegal play, the right of challenge actually falls to Tigers as negative recipients of that call. So again there is no captain's challenge permission to Cowboys.
Either it's a tackle, in which case it's play on for Tigers, or it's a penalty called by the ref /bunker, in which case Tigers can challenge the penalty. There is no avenue for Cowboys to call a challenge on a decision not made by the referee, and the "stop in play" is seemingly only produced by intervention of the bunker in a possible infraction, which again has not been ruled on.
Unless we are now entering a new version of the rule where the bunker can intervene in any play, to "encourage" one of the captains to raise a challenge, likely with an indication that the challenge would be deemed successful. That would be like the reverse of the ref's standard "well you can challenge if you want", which typically discourages the captain from challenging, because in this case bunker intervention would forewarn you that there is something worth challenging.
And as a point I made in another thread, this now incentivises all clubs in desperate or late-game situations to cause or attempt to cause an infraction, to encourage bunker or referee intervention which will then take a decision upstairs. And every close match from now on ends with a captain's challenge from the desperate side, trying to use any mechanism to regain possession for a last-ditch effort, and every team retains their challenges until the death, when they can be deployed like foul-related time-outs in basketball.