Why do https sites open every other time?

Question

Computer networks

Good day.

I have a Dlink Dir-655 B1 v 2.09 router. Connecting to an ISP via PPPoE.

Recently, sites with a secure https connection began to open every other time. Android apps using a secure connection (especially the Google app) are also updated every other time.

Connecting directly, without a router, everything works well. Accordingly, the problem is not with the provider.

What can be done with the router?

Answer 1

as a temporary solution (crutch) on the router, you can register (forcibly) the DNS server Yandex or Google