Considering moving jobs after only 3 months

Hi Elpha, I currently work at a small start up that is well funded and run by a great team. While I've enjoyed most of my time so far I've come to realize that a start up probably isn't the right place for me long term. I don't usually check my work accounts outside of office hours unless I'm expecting something to come up or there is a project I'm working late on. This means I've missed important discussions that happen spontaneously at 10pm because I'm already in bed or not checking my phone. The team has assured me that it's fine if I don't respond outside of office hours but I still feel guilty and a bit annoyed that I'm not able to fulfill what is supposed to be my role in the company.A recruiter recently reached out to me about a position in the same industry (but a very different product) at a much more established company. If I end up getting the position it would also result in a 15-20k salary bump, something that wouldn't be possible at my current job until we (hopefully) have a second successful round of funding.While the offer isn't guaranteed yet, I'm seriously considering moving jobs. My main issue is that I feel incredibly guilty to be leaving my current company when they're at such a crucial stage of development. I know they'll find someone else but I still feel really bad to be considering leaving after only 3 months. I also don't want to completely alienate the team because they're all people who I really respect as professionals and also as great people in general.Any advice would be appreciated!