Your downstream sync rate is capped/banded at 11.4Mb.
There's only 1dB SNRM to spare worth about another 1Mb if it wasn't capped.
To have have such a big drop in sync you either have a new crosstalker (neighbouring line with FTTC causing interference) or the DLM had acted on your line dropping the target SNRM from 3dB and also applying the cap.
You could ask the ISP for a DLM reset but they can refuse this.
It's also likely to temporarily slow you down while DLM reapplies G.INP.
Any drop in sync rate over 25% in 14 days used to be considered a fault automatically on FTTC.
Edited by j0hn83 (Mon 03-Feb-20 14:33:18)