Every release of Android comes with some bug fixes, but they aren’t usually worth going over one-by-one. That’s not the case with the infamous Marshmallow MMS bug, which has slowly driven many of us insane over the last few months. Thankfully, it was fixed in Android 6.0.1.
This bug was triggered mostly when installed apps had access to the MMS database. Pushbullet users were particularly vulnerable. Whenever it did happen (usually after a few days of use), MMS messages would just hang when downloading.
Android 6.0.1 Fixes The Annoying Failed MMS Bug In Marshmallow was written by the awesome team at Android Police.
Source: Andriod Police