Care to share more details about this? Which account? What do you mean by “suspicious”? What specific effects does this have?
I use a VPN 24/7 on one machine. Zero issues even with banking, although sometimes I have to answer CAPTCHAs.
Your VPN provider shares their IP lists publicly. For a lot of website owners, blocking those is a simple way of getting rid of 80% of spam.
Some sites block or offer a degraded experience for VPN traffic. This happens occasionally when I use Mullvad.
Some examples: Imgur loads but does not display any content. USPS's website does not load.