I wouldn't be concerned with that. Mining software is flagged by AV, because malicious websites use code that allows them to mine with your computer while you are on their site, without you knowing it.
Errrm, that is not why it's flagged.
It flagged because hackers put mining software inside their viruses so they can command and control your machine to mine for them. What websites run has nothing to do with malware signatures.
If you're using mining software that isn't established and proven to be legit by the masses, you're a fucking idiot. And if you're downloading legit mining software from sources other than the proven and established ones, you're a fucking idiot.
Legit mining software is flagged by AV ... Hmmm, I wonder why. Lol.
Get it from a legit source, and you're fine. And don't download wallets for shitcoins that you've done zero research on. Jesus Christ people.