No problems on default OpenWRT firmware for me:
Chipset: Lantiq™ XWAY™ VRX268
Firmware Version: 5.7.9.9.0.6
API Version: 4.17.18.6
MEI Version: 1.5.17.6
Power Management Mode: L0 - Synchronized
Line State: UP [0x801: showtime_tc_sync]
Line Uptime: 26d 3h 14m 11s
Resyncs: 5
DSLAM/MSAN VID:
XTSE Capabilities: 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2
Annex: B
Line Mode: G.993.2 (VDSL2)
Profile: 17a
Trellis: D: ON / U: ON
Bitswap: D: ON / U: ON
G.INP: D: Not Enabled / U: Not Enabled
Virtual Noise Support: D: Not Supported / U: Not Supported
Attain Data Rate: 87.334 Mb/s / 25.058 Mb/s
Actual Data Rate: 79.995 Mb/s / 20.000 Mb/s
Impulse Noise Prot: 0.0 sym / 0.0 sym
Interleave Delay: 0.0 ms / 0.0 ms
NFEC: 255 / 255
RFEC: 16 / 16
LSYMB: 21451 / 5410
Interleave Depth: 1 / 1
Interleave Block: 255 / 255
LPATH: 0 / 0
Line Attenuation: 11.8dB / 13.4dB
Signal Attenuation: 11.8dB / 13.2dB
Noise Margin: 4.2dB / 9.3dB
Transmit power: 13.8dBm / 3.3dBm
FECS: 54547 / 16902
ES: 3201 / 31817
SES: 0 / 17
LOSS: 6 / 0
UAS: 145 / 145
HEC: 0 / 0
CRC_P: 0 / 0
CRCP_P: 0 / 0
15m Code Violations: 0 / 2
15m FEC Errors: 3 / 3
1d Code Violations: 30 / 68
1d FEC Errors: 6402 / 296
I was curious though, can you get the hlog using a stock build of OpenWRT?