No, bitsler not blocking account like that. Gambling isn't allowed in my jurisdiction where I live currently. Even gambling site not allowed from my home country as well. So in a result I can't access from both countries to Bitsler account and by force I have to use VPN for login Bitsler account. So when I need to login I just use VPN on my phone and it's free VPN. Still now I didn't face any problems nor locked my account.

I don't think any website should locked account instantly just because of change devices or IP. They might ask for verification like mail. And its quite reasonable to confirm security of your account. But we should remember, trying abuse the system would cause suspended your account.