Error 8 (0x8) GATT CONN TIMEOUT On Android

[why_do_i_need_a_user_name]

NRF51422 Custom board

SD310 v3.0

Phone: LG K8 4G

Android 6.0

SDK 9.0.0 Boot-loader example

I am testing over the air DFU with our custom device.

a.) DFU using NRF Toolbox on IPhone works fine.

b.) DFU using MCP\NRF51 dongle works fine.

c.) DFU using NRF Toolbox on Android fails with "upload failed GATT error"

nRFConnect on Android can connect with our device but loses the connection after about 6 seconds and the logger captures the following error:

Error 8 (0x8) GATT CONN TIMEOUT

[why_do_i_need_a_user_name]

Do you suggest we keep the new settings?

Could the new settings adversely effect Android phones that currently work ok with this bootloader?