checks online revocation data
Was this checked also in earlier versions before v6 ?
And from where does he check them?
Me, as it head of our branch, have implemented some of the affected system. For example grafana, I put the appropriate pfx certificate inside there years ago and it hasn't changed since. The whole certificate chain should be valid, but the root certificate is issued by an internal CA (is properly inserted into the cetrification store), can this have an influence ?
Vivaldi is installed as a standalone, so in an identical OS I can easily switch between v5 and v6, only v6 has a problem. Therefore I suspect some changes in v6.