inexplicable c++ behavior

struct TimedEvent {
    EventType_t event;
    std::chrono::duration<long double> timestamp;

/* //adding this section makes it work
    template <class T, class U>
    TimedEvent(EventType_t && e, std::chrono::duration<T, U> && t) {
        event = std::move(e);
        timestamp = std::move(t);
    }
*/
};

std::vector<TimedEvent> timedEvents;

auto t1 = TimedEvent{a1, std::chrono::seconds(1000)}; //works
auto t2 = TimedEvent(a1, std::chrono::seconds(1000)); //doesn't compile without the added constructor
//also doesn't work, probably for the same reason:
//timedEvents.emplace_back(std::move(a1), std::chrono::seconds(1000)); //doesn't compile without the added constructor