I encountered a bug

The bug is in the incorrectly working chance of catching a drawing of desert glasses in the oasis, after 3 fishing rods not a single drawing, although the chance is as much as 26%, but a dozen sand toys and trinkets fell out (I remind you, the chance is 1.3 percent). I checked in another world with a mod for creative, there too nothing fell out, only a bunch of trinkets and items with a much smaller chance