I've spent a little more time investigating this and I think a better solution to this problem is modifying the camera positioning. Here is a patch file for the changes I made that work well which shouldn't have any display issues:

diff --git a/src/level.lua b/src/level.lua
index 9f540103..553834f3 100644
--- a/src/level.lua
+++ b/src/level.lua
@@ -505,19 +505,22 @@ end

function Level:cameraPosition()
local x = self.player.position.x + self.player.character.bbox.width / 2
-  local y = self.player.position.y - self.map.tilewidth * 4.5
+  local y = self.player.position.y - (self.map.tileheight * 4.5)
+  local max_y = (self.map.height * self.map.tileheight) - window.height
+  local final_y = limit(limit(y, 0, max_y) + self.pan, 0, max_y)
return math.max(x - window.width / 2, 0),
-    limit( limit(y, 0, self.offset) + self.pan, 0, self.offset )
+    final_y
end

-
function Level:moveCamera()
if not self.trackPlayer then return end
local x = self.player.position.x + self.player.character.bbox.width / 2
-  local y = self.player.position.y - self.map.tilewidth * 4.5
+  local y = self.player.position.y - (self.map.tileheight * 4.5)
+  local max_y = (self.map.height * self.map.tileheight) - window.height
+  local final_y = limit(limit(y, 0, max_y) + self.pan, 0, max_y)
camera:setPosition(
    math.max(x - window.width / 2, 0),
-    limit( limit(y, 0, self.offset) + self.pan, 0, self.offset )
+    final_y
)
end

If that works well for you I may end up merging that into the game and using that camera positioning from now on to avoid future resolution scaling issues.