Pace of early dating/ communication

Hey everyone! I’ve met this guy through a mutual interest (an open mic) about 2 months ago. We’ve run into each other several times and have had great interactions. He asked me out in early april and we loosely made plans. In the middle of trying to make plans, he stopped responding for a week. I was super annoyed and figured he wasn’t interested. I saw him shortly after at the open mic & he acted completely normal, went out of his way to approach me, and asked if I still wanted to get together. I was kind, but a bit aloof & did not extend my normal warmth and enthusiasm. The next day he texted me asking if I’d want to get a drink. I initially wasn’t going to go, but I ended up going and he made a lot of effort, apologized for his gap in communication, and was very attentive and engaged in the time we spent together. We spent 3 hours talking, really hit it off, and had a blast- the connection felt like it was really there. I reached out the following day thanking him for a great time. He said we should hang out again. soon, and I told him to let me know when he’d be free next. He asked if I’d be at the open mic this Monday and then also threw out Tuesday evening as a time for another hang. I said yes to both, but after we established that and a few other messages back and forth briefly, he hasn’t continued communication through text. Should I take his lack of communication as a red flag? Was it also a red flag that he dropped the ball on communicating with me for a whole week before following through with a plan for a (last minute) first date? I know it’s really early on, and everyone has a different style of texting, but I wanted to gauge some outside opinions.