Technical difficulties played a part in the Bears’ battle for the No.  2 quarterback spot when Jimmy Clausen was hampered by headset issues for ‘‘three to five plays’’ in the Bears’ 20-19 victory over the Jacksonville Jaguars on Thursday night at Soldier Field. It’s not the first time the Bears have had communication problems at Soldier Field. ‘‘We had an issue a few times last year,’’ coach Marc Trestman said. ‘‘But other places I’ve been, there have been issues like this, so I don’t think it’s exclusive to Soldier Field.’’ Trestman said Clausen’s headset was inoperable on the pass play in which Clausen was intercepted by Jaguars safety Josh Evans after the ball was tipped by rookie linebacker Telvin Smith. ‘‘Jimmy did a good job of at least getting a call up that was a sound play,’’ Trestman said, ‘‘and it was a similar one to the one we called, except the . . . call wouldn’t have been a deep-over. The call would have been a shallow. But coverage dictated on that play that he go back to that side, but [Smith] really made a heck of a play. If Jimmy would have checked it down, he would have gotten a completion.’’ Clausen was 11-for-15 for 94 yards and the interception for a 61.5 passer rating. Jordan Palmer, who had no known communication problems, was 6-for-9 for 73 yards for a 91.4 rating, leading two touchdown drives to win the game