Exit door placed out-of-bounds in Aqualite Reefs when there's too much water (Issue by certain seed, random map size and difficulty)

[Fluff8836]

Describe the bug
seed.txt
The exit door generated is two tiles BELOW the bottom of the stage and inaccessible at the start of the game (Depth 1). The seed is 5586966739917086460 and this happens only on Resonant difficulty and when Random Size For Maps is enabled.

This ruins the no-save run. Seeing the save disk is accessible, the only way to progress is to save the game and reload, causing different placements of stars & enemies and relocation of the save disk & exit door. This way, the door is then accessible.

You may want to run this in Fullscreen resolution before you reproduce...

To Reproduce
Steps to reproduce the behavior:

1. Download the text file above and save it to the folder where Randamu.exe is.
2. Open Randamu.exe, hold [Ability] and select Gameplay Options, set Random Size for Maps to On. Return to the menu and start a new game on Resonant difficulty.
3. If Map System is enabled, open it and you'll see the problem. The screenshots below shows it with the Improved type.
4. You may save and reload to continue

Version
1.45.2.3

Screenshots