you dont necessarily need to drop the motor - the usual cause is too much cable, and it gets kinked when the post is inserted. You can actually pull/push the cable outer through the frame with a bit of elbow grease.
First step should be to see if you can shorten the cable/housing.
I am not sure if the new dropper lever on 2019 models means if the cable is clamped at the remote or at the post end?
Either way I would cut the two cable ties down by the shock that hold the dropper cable tight to the frame to avoid fouling the shock - make sure you have some cable ties handy to replace these later on.
Now move the post to its minimum insertion and see if the dropper works and check the cable isn't lined near the shock - if so its the cable being bunched up kinked that's at fault.
What I did is cut the cable down so that I actually have to pull the cable back through the frame a bit if I want to fully remove the post, which means the cable is not kinked
I did this by unclamping the dropper lever, then pulling the cable outer back about 10 cm further into the frame - you will likely have to push the cable from he top tube end and pull it from by the shock, then feed It up the seat tube - I then cut it down so that the cable just pokes out of the top tube enough to connect to the post.
The I reversed the process, pushing/pulling the cable back though the frame the same amount I pulled, it, and reconnected the lever etc. The re zip tied the cable to the frame, but not as tight as it is from the factory.
Sorry not the best description but you get the idea!