We had a similar issue when our 2020 Ventana was new. I added some caulk, but occasionally we would see water show up on the floor by the door.
I added an extension to the rain shower head, one to make it a little easier to get under it, but mainly it helped the water from spraying towards the shower door. Since adding the extension, we have not seen any water outside the shower.
2020 Newmar Ventana 4369