diff --git a/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java b/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
index 36fca525..d12e426f 100644
--- a/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
+++ b/common/src/main/java/org/embeddedt/modernfix/core/config/ModernFixEarlyConfig.java
@@ -223,6 +223,7 @@ public class ModernFixEarlyConfig {
         disableIfModPresent("mixin.launch.class_search_cache", "optifine");
         disableIfModPresent("mixin.perf.faster_texture_stitching", "optifine");
         disableIfModPresent("mixin.perf.datapack_reload_exceptions", "cyanide");
+        disableIfModPresent("mixin.bugfix.buffer_builder_leak", "isometric-renders");
         disableIfModPresent("mixin.perf.faster_texture_loading", "stitch", "optifine", "changed");
         if(isFabric) {
             disableIfModPresent("mixin.bugfix.packet_leak", "memoryleakfix");
@@ -235,7 +236,7 @@ public class ModernFixEarlyConfig {
         if(!ModernFixPlatformHooks.INSTANCE.isDevEnv())
             return;
         try {
-            if(ModernFixEarlyConfig.class.getResource("/net/minecraft/world/level/Level.class") == null) {
+            if(ModernFixEarlyConfig.class.getClassLoader().getResource("/net/minecraft/world/level/Level.class") == null) {
                 LOGGER.warn("We are in a non-Mojmap dev environment. Disabling blockstate cache patch");
                 this.options.get("mixin.perf.reduce_blockstate_cache_rebuilds").addModOverride(false, "[not mojmap]");
             }