Curious, since all along we assumed the abrupt end to her online convo was with her BFF SO.
Now we learn it was with JL.
This would have been just after Puckett spotted Barry at the shop bringing in his bobcat attachment plate/thing. He seemed to recall it was around noon, 1 or 2, so the timeline seems to match up for sure.
Unless I'm confused - this also sounded like an abrupt end of the conversation on HIS end (the/my gang is home), otherwise it's possible SM could have continued to chat with him. IMO