Yeah Ive been hearing the same thing.
Its on dispatch end.
When dispatch sends out the tones regardless if metro hears the entire page, its on their MDTs in the ambulance anyway so that's why the medics aren't saying can you resend the page. The call and all the other info is on the MDT. But it also seems like their MDT system is not at all reliable. If MDT system is down I would imagine they would request another page be sent.
I also think its how the dispatcher is doing it. some never have the issue and others seem to cut off the pages when they do it.