I take a big surprise in yesterday. Having spent my ptp with r52n to Nstreme worked all right for a day until it was shutdown and re-ignition of one of the teams. From that point, the delay went into the clouds and there was no way back. Only be restored when Nstreme deactivated.
I'm using v4, 5, RB411
In the configuration of radio: 5GHz band (not use N so as not stable yet)

I add other important information to analyze the problem:
With Nstreme
The signal level is -50 / -53
The CCQ 100% TX and RX 1%

Without Nstreme the TX CCQ 100 '% and 100% RX