My 1. first question in the tittle. Everybody knows that exit nodes able to know which clearnet sites and pages are used. But what about onion sites?
And 2. the second question. Tor is blocked in my country. But I have some suspicious issues with obfs4 bridges. One (lets call first) obfs4 is used for 4+ months, but sometimes its frequently changing to 1-2 others (lets call the second and the third). After 1-2-3 days of using the second and the third bridge, the first goes back again and permanently for weeks.
Is it normal experience?