MKS Instruments Production interview questions

I went on-site for a 3 hour interview in Andover then had a follow-up virtual interview the next week with a manager so they could have final input. So 3.5 hrs of interviews all together and it's now been almost 5 weeks and I have not heard a word from them, rejection or otherwise. I've reached out to the recruiter multiple times to no response. Just unprofessional and very disappointing experience as a whole, From reading other reviews it seems like ghosting candidates is a common move by them so just keep that in mind.