Not familiar with that charger, so I'll hazard a guess that Victron charging setup effort for your battery type isn't finished yet.
When I hook up a "smart charger" (LiFePO4) to a set of new LiTime batteries, they'll increase in charge up to near what the vendor says they should hold. I have several, but one such charger is the NOCO, with a LiFePO4 selection on it's front panel. By the next day, they'll drop by some hundredth's, as measured by multimeter. I assume the BMS is eating some power for whatever it does.
That didn't seem important at the time, as my goal was to get the batteries ready for battery-bank use, per the LiTime manual:
1. charge each battery to within a few hundredth's of *each other*.
2. parallel them for 24 hours (final balancing by the internal bms boards)
3. then throw them into battery bank, not exceeding LiTime's rules on how many can be in serial, etc.
And after that, hopefully your battery-bank will be doing what you expected, as it's being charged by the other solar gear. That's been my experience so far, with both AmpereTime and now LiTime batteries ...
Hope this helps ...