I can well understand your concern, and you are right to be cautious, however, have a read of my situation from many years ago, and try to bear it in mind.
I was forced to sell a house due to grotty neighbours. I had been there for over six years at that point.I will say that the neighbours in question did not discriminate or single me out and therefore other neighbours were affected too, however, due to all this being not personal to us (we just couldn't stand it) and was never reported to the police, there was nothing to declare upon sale.
We sold immediately, but what I didn't realise at that point was how much my mind had been affected by the neighbours, and by having to sell a house I loved, and by the usual stress of moving. Add to this I had given up a successful self-employed business to work for a company and it wasn't going well (not my fault).
I couldn't find anything in terms of a house I liked, I also was torn between staying in the area or moving far away. We eventually bought a house far away. Within a day or two of moving, I was told I was going to be made redundant. I hated where we had to moved to (even though it was an adorable area), and couldn't get over how far away we'd moved from my family.
At this point I had something of a breakdown, I didn't know it at the time, but it made me really, really ill mentally.
Within weeks my husband was saying to me we must move if I'm not happy, so that became our plan. I managed to turn a corner mentally, and restarted my business successfully. Then came the blow that my husband may lose his job (big back story to that which I have no desire to disclose). He didn't but it took several months to find out how it would all pan-out.
We worked frantically to modernise the house we'd bought, so as to get a quick sale and make some money to move. In all, we were in the house 1 year and 4 days, but it went on sale a good three months before we sold.
I know this is a very long winded post, but I wanted to highlight sincerely how s**t really can happen. Having had bad neighbours, I also think it would take a lot longer than eight months for someone to consider moving again, unless they were horrendous, but I'm inclined to think if they were that bad there'd be some obvious evidence to say as much.
Do your research, talk to neighbours, but keep an open mind too. Good luck.