data rate

Hello,
I use 14580 Pro board, SDK5.0.4. I found that when fixed the sensor sampling rate, if I set the connection interval too large, the board will disconnect after several minutes. If I change the connection interval smaller then it won't disconnect. When it is disconnected, it stops at:
void wrap_platform_reset(uint32_t error)
{
ASSERT_WARNING(error==RESET_AFTER_SPOTA_UPDATE); //do not break in case of a SPOTA reset
platform_reset_func(error);
}