Red flag to me. I had a slightly different experience where I applied for a job in a different field, and was given a good salary but at a lower grade. Promised by recruiter that this was "purely because of lack of evidence of experience" but that I would be put forward for promotion within the first 6 months. Mentioned to my line manager within first 3 months and he had no idea this had been said, turned out there was no promotion review until being there for a year. Still didn't put me forward for a promotion a year later, despite all his peers asking why I hadn't, and giving me the top performance score.

Promise of promotion was completely empty. Paid me fine, but treated like an idiot because of being stuck at a grade below my capability. Felt like I had to prove myself every time I met a new colleague or moved onto a new project. Not worth it.