Given you are on a Huawei cabinet it is highly likely that G.INP will kick in soon. That will remove the latency increase and your interleaving level will probably fall to 8, with a zero delay setting.
Bearer 1 will also appear as that's used by G.INP. Not all kit reports it in the stats, but ZyXel and Billion do in the CLI.
Interesting, I'll certainly keep my eye on the stats to see what happens.
I use dslstats typically and this is what's currently reported:
DSLAM/MSAN type: BDCM:0xa48c / v0xa48c
Modem/router firmware: AnnexA version - A2pv6F039g1.d24m
DSL mode: VDSL2 Profile 17a
Uptime: 1 hours 53 min 25 sec
Resyncs: 0 (since 17 Nov 2017 09:39:19)
Line attenuation (dB): 21.7 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 51334 9895
SNR margin (dB): 5.9 5.9
Power (dBm): 12.6 6.3
Interleave depth: 1189 209
INP: 3.00 4.00
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
Ince the DLM intervention, both the down attainable rate has increased to 60 odd Mb/s which is a marked increased since the SNRM started to settle, before DLM came into play.
Service: FTTC Unlimited (55/10)
Modem/ router: Billion BiPAC 8800AXL
Current sync: 54998/ 9999