My 2018 FC23FB shower leaked also. My concern, however, was the water coming under the paneling into the walk way area by the outside entrance door.
I dried everything out. Found a screw that went from the base of the shower into nothing. Inserted a longer screw until it finally grabbed something.
I found some gaps in the factory calking. I recalked the inside shower just by the door with white tub/shower sealant.
Water leakage stopped.
A. What the inside shower door needs is a similar aluminum drip rail attached to the bottom of the inside shower door to keep the splashed water from getting under the sill and onto the bathroom floor. My shower in my home built in 1955
has one. Never any water on the floor.
B. I suggest you get a California Dry Blade (Red one) and after showering and before opening the door, squeegie the shower door top to bottom and the sill of water before opening the shower door.
C. From the shower door outside, grab the shower door from the top. Lift upward. There should be lateral movement of the shower door. The shower door should move downward to the closed position. If there is limited lateral movement of your shower door, your shower door may be mis-aligned.
D. Use Norwex towels in the bathroom especially one on the floor next to the shower door. They absorb a great amount of spilled water when the shower door is opened.