Mine (line crossings) are still working. I wish I better understood the technical reason why it stops for sometimes months, then resumes. As mentioned in prior posts, there were no changes on my user end (and no app updates).
...and once again push notifications have stopped on IVMS-4500. This is complete insanity - as has been the case previously, no changes on my end at all.
For the record, the IVMS-4500 worked for a week or so in August 2021. Since then service has been unavailable. I have not made any changes to the configuration, so I'm rather certain that it is a server side issue.