Me too log- disconnected, received deauth: class 3 frame received (7)
device Redmi note 7. Routeros 6.45.7
+1This really sucks.16Mb Flash is maximum for QCA9531 Qualcomm CPU.
Maybe look at the possibility of having microSD slot or moving ROS system partition to USB stick (and having USB port on the device itself in a first place...)?