Low initial gain in transmitted data, then recovers to normal - USRP B210

[piaooo]

I've noticed that the gain of the transmitted data is initially low and then later recovers to normal. I'm using a USRP B210. Has anyone else experienced this issue?

Below is a segment of the received data:

***** rssi= -44.95dB evm= -15.25dB, header:pass, payload[   956,    79 bytes]:pass
***** rssi= -45.93dB evm= -16.13dB, header:pass, payload[   957,  1065 bytes]:pass
***** rssi= -44.43dB evm= -16.61dB, header:pass, payload[   958,  1123 bytes]:FAIL
***** rssi= -46.04dB evm= -14.70dB, header:pass, payload[   959,   769 bytes]:FAIL
***** rssi= -54.57dB evm=  -4.21dB, header:pass, payload[   962,   237 bytes]:FAIL
***** rssi= -53.71dB evm=  -3.58dB, header:pass, payload[   963,   250 bytes]:FAIL
***** rssi= -55.24dB evm=  -2.03dB, header:pass, payload[   964,   614 bytes]:FAIL
***** rssi= -54.78dB evm=  -0.18dB, header:FAIL, payload[    -1,    -1 bytes]:FAIL
***** rssi= -53.35dB evm=  -5.38dB, header:pass, payload[   965,   858 bytes]:FAIL
***** rssi= -53.38dB evm=  -4.92dB, header:pass, payload[   967,   333 bytes]:FAIL
***** rssi= -50.24dB evm=  -7.20dB, header:pass, payload[   968,   460 bytes]:FAIL
***** rssi= -53.20dB evm=  -6.70dB, header:pass, payload[   969,   956 bytes]:FAIL
***** rssi= -49.93dB evm= -10.05dB, header:pass, payload[   970,   789 bytes]:FAIL
***** rssi= -44.06dB evm= -15.69dB, header:pass, payload[   972,    26 bytes]:pass
***** rssi= -43.75dB evm= -15.71dB, header:pass, payload[   971,   666 bytes]:pass
***** rssi= -41.70dB evm= -17.82dB, header:pass, payload[   973,   427 bytes]:pass
***** rssi= -44.17dB evm= -15.89dB, header:pass, payload[   974,  1047 bytes]:FAIL
***** rssi= -37.84dB evm= -20.00dB, header:pass, payload[   976,   182 bytes]:pass
***** rssi= -42.05dB evm= -20.06dB, header:pass, payload[   975,  1030 bytes]:pass
***** rssi= -39.65dB evm= -22.63dB, header:pass, payload[   978,   330 bytes]:pass
***** rssi= -35.11dB evm= -22.71dB, header:pass, payload[   977,   867 bytes]:pass