I don't know if this is a bug or not but I can't take any radiant quest anymore after reaching level 50+ . No more quest from Minutesman and Brotherhood of steel. Knight Rhys doesn't give me quest anymore same as general, no dialogue option from him but the other one still available(fetching item and learning curve quest etc.).

Preston and Freedom radio also doesn't give quest anymore, just a simple dialogue from Preston and 'nothing to report' from freedom radio.

If this is the game design then it's fine but I really like the radiant quest. I keep coming back to play because of that.