(I'm using Unity 2022.3.9f1)
Bug: when using 'light' GUI theme, buttons in Better Rule Tile editor window are nearly un-readable.
Bug: toolbar button images are bit too large and "hang off" the bottom of the buttons
Maybe not a bug, but a code-smell: In Runtime/Scripts/BetterRuleTileContainer.cs, there are several functions with code like this:
var cell = _grid.Find(t => t.Position == tiles[i].Position ); if (cell != null) cell = tiles[i]; else _grid.Add(tiles[i]);
In this case 'cell' is not used and the assignment will likely be optimized away, but the code is misleading (there are several variants of this code in the various Area / Block functions.