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LAUNCHXL-CC2650: simple_peripheral and multi-role examples will disconnect from Andriod SimpleLink Starter APP

Part Number: LAUNCHXL-CC2650
Other Parts Discussed in Thread: CC2650,

I test simple_peripheral and multi-role examples in ble_sdk_2_02_02_25 and see both examples will disconnect automaticaly from Andriod SimpleLink Starter APP after they connect to the APP about 15-20 seconds. I test Sony Xperia with Andriod 6.0.1, Google Pixel3 with Andriod 9, and Xiaomi Redmi 6 with Andriod 8.1.0.011019 and see the same issue on all these Andriod phones. I also test those examples on Samsung Galaxy J2 with Andriod 5.1.1 and don't see disconnect issue. If I test simple_peripheral and multi-role examples with iPhone, I also don't see such disconnect issue. Is this a known issue and how to solve it?