Allowing bets on sporting events on mobile devices continued to stall at the Capitol on Tuesday, as Democrats in the Assembly continue to have concerns over the measure’s constitutionality.

The bill, approved in the state Senate on Monday, would allow sports bets to take place on apps for smartphones and tablets, with severs placed in casinos.

But Assembly Speaker Carl Heastie speaking with reporters on Tuesday said his chamber continues to have issues with the bill, putting its approval in doubt for the final week of the legislative session.

“Our counsels still believe there’s some constitutional concerns,” Heastie said. “I believe the governor — even though he may have softened it — still has those concerns and the gaming commission as well. So, I don’t know what’s going to happen with that.”

Supporters of the measure contend approval would shore up revenue for the state that’s potentially being lost to neighboring New Jersey. The major sports leagues have backed the proposal.