Some extra info from my end. While I also have the issue where currents under 2 amps are not shown, my SOC% still updates. I wonder if maybe the BMS is actually sensitive up to 500ma but the reporting is not providing the info between 500 and 2000 mA.We found the exact same problem. It has been brought up to engineering.
Also for mine it was exactly 2.0amps where it would last report and not go under. This gave me the immediate thought that maybe there's some error somewhere where 12v = 500mA, and it gets multiplied so the 24v battery reports after 1amp and the 48V after 2 amps. This is just a gut feeling but if someone has a 24v battery that they could test this hypothesis on, it might lead to finding a fix faster.