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CCS/CC2640R2F: bluetooth advertise but cant connect to the device

Part Number: CC2640R2F

Tool/software: Code Composer Studio

Hai,

we have developed a custom board with reference design as cc2640r2f launchpad. and our design consist of power supply part ,CAN network and cc2640r2f
first cc2640r2f and power supply section soldered and upload the project zero app code to the board it advertises and we can able to connect it with BLE scanner and other low energy bluetooth apps

but when connect the other section(can,spi )the same code advertises but can't connect with the device.it shows discovering services but suddenly disconnects in ble scanner .we have changed the crystal but also the problem persists.the schematic circuit diagram are uploaded with this.

the rf side works fine when it is checked with smart rf studio.can_btdongle.pdf8883.ckt.pdf5327.ckt1.pdf 0820.BOM.pdf