I have a camera with a similar issue. Ever since the release of firmware mentioned, I have to install each new release manually. If I try to install via the app the camera just hangs and never comes back online. I’ve tried every suggestion offered by everyone here.
I’ve come to the conclusion that it is just easier to update it manually with each new release versus continuing to try this and that and this and that and this and that with zero resolution. I’ve literally spent easily a dozen hours troubleshooting it. Good luck, but I’ve thrown in the white towel when it comes to this specific issue on my one problem child cam.
Edit:
Here is the thread I created regarding my issue. There are a few suggestions in this thread which may work for you? Again, I wish you the best of luck towards resolution. Please let me know if you hours of effort pay off: v3 Will Only Update Firmware Manually