Usually the account will be locked if we log in using a different IP and PC/Browser, but I don't know whether Bitsler implements security like this.
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.
Only if there are rules that restrict locations (with IPs) that are not allowed to use Bitsler or if one logs in account on different IPs or devices, there is notification in email to confirm new devices, new IP for the first time of log in. Honestly, I feel it a little annoying but I understand that is somehow to increase protection for users from hacks so I see good things from this approach. As I know, there are only required confirmations, not lock or ban accounts due to this.
Some casinos more seriously lock accounts that violate their rules (without VPS) but it is not what Bitsler manages their site, currently.