yes, i was told ideally you should dig it out take a look at the bucket after 3 or 4 years to check and pull out excess dirt fallen in to 'unplug' holes...but my bucket is big and has big holes so doubtful for flow problem. but i will check anyway - never assume.
You can buy what they call "socks" filter material mesh that you pull it along the drainflow pipes, thise black tubes are punched with holes to collect water and you need a gradient only slight willl work, to use gravity to bring rainwater from the area to the pit/hole or stormwater street drain pipe (i did that for the other side of the pavers) i ripped out the U shape 90 degree angled and replaced with a T connector (upside down) and added a catch pit in between that and the flow pipe, was tedious, long ass hours to do it but done it and it WORKs so well...all on my own. no training nothing...i feel i achieved something there