If you upgrade to Android Q third beta version, then the device is not being constantly recently restarted engage in crashes fact true, because there are many users have encountered a similar situation, we Tucao Google voice getting Big.
Many users find that their equipment upgrades to Android Q Beta 3, after market equipment will restart occurs, and the restart of the state without any warning, people caught off guard.
Android Q reboot constantly: Google confirmed the fix as soon as possible
The results from the analysis of some developers see the situation is caused by Project Mainline. Project Mainline is updated Android Q Beta 3 in the main push, Google's goal is to, as quickly as possible, consistent and easily provide security updates for users of mobile phones.
As more and more users Tucao voice, Google responded that regard, did find there have been cases of forced reboot after running Project Mainline, but said these issues will be fixed in Android Q Beta test version, it will not appear in the official version in. 
In the Project Mainline, the total included 14 Mainline components related to security, privacy, three aspects of consistency, and in the new module component upgrade mechanism, you can upgrade more convenient, such as Play application store to download and install update.