We've noticed on a ESS system comprised of a Multi-II 5KVA + MPPT 150/100 with 2x Pylontechs US2000, that even if we activate "Limit inverter power" , the current drawn by the US2000 will still be ultimately determined by the DCL and BMS and NOT overriden by the "limit inverter power" option, which is worth noting (-68A sudden burst from 2x US2000, inverter power activated at 1200W).
So my guess is that the limit inverter power function is only working when you've got non managed (ie : lead acid, etc...) batteries with an ESS....