Starting from March 3rd, I found that some of the devices that returned 400 BadDeviceToken before can be pushed successfully, and their device tokens remain unchanged.
On March 9th and 10th, this situation became more prominent, and more devices that were previously identified as invalid tokens by apns now returned push success.
I don't know what's going on, anyone else has something similar happen?
Whether apns has undergone some changes, I tried to contact the official, but did not get an effective reply.