--- luatex-fonts-otn.lua.orig	2014-04-05 15:02:34.711828352 +0200
+++ luatex-fonts-otn.lua	2014-04-05 15:02:36.955171990 +0200
@@ -2375,7 +2375,7 @@
                                 end
                             end
                             start = start.next
-                        elseif id == math_code then
+                        elseif id == math_code and start.subtype == 0 then
                             start = end_of_math(start).next
                         else
                             start = start.next
@@ -2567,7 +2567,7 @@
                             end
                         end
                         start = start.next
-                    elseif id == math_code then
+                    elseif id == math_code and start.subtype == 0 then
                         start = end_of_math(start).next
                     else
                         start = start.next