The app is larger than 131 072 B (128kB) and still works ?!?

My app compiled against 1.4.2 firmware is 131 636B in size. This is larger than the 128kB limit for user app. Both the make process and dfu-util/particle cli throws no errors while flashing electron. App works well w/o any problems. Or at least is seems that it does.

Right after the user app there’s “Factory Reset/Extended Application” memory area. This definitely means that my app overwrite this area. Is this supported or at least safe to have the app code in this area?

PS. After all flashing backup app into factory area makes electron with 1.4.2 throw assert errors right after the cloud connection is established, so if I can use this +128kB space for my app code, then why not.