Same issue here running Opera GX 119.0.5497.43. Started occurring a few updates ago, around early May.
It works for a few minutes but then everything just kind of stops. If I open pages and they fail to load and then close Opera and re-open it, the pages don't automatically open and done show in my history at all.
I read in other posts that this is caused by Anti-virus software such as Kaspersky which is what I use, But I have complete disabled the antivirus software and it is persisting. Additionally a friend of mine who does not use Kaspersky is experiencing the same issue on his PC.