Aaaaand that mod has two parts

src/main/java/gregtech/asm/GT_ASM.java

@@ -94,6 +94,7 @@ public ASMConfig(File mclocation) {
 			if (mclocation == null) throw new RuntimeException("Failed to acquire `location` in GT6 CoreMod");
 
 			transformers.put(MultiPart_FixLoggerCrash.class.getName(), true);
+			transformers.put(MicroBlock_FixLoggerCrash.class.getName(), true);
 			transformers.put(CoFHCore_CrashFix.class.getName(), true);
 			transformers.put(CoFHLib_HashFix.class.getName(), true);
 			transformers.put(ExtraUtils_FixThaumcraftAspects.class.getName(), true);

src/main/java/gregtech/asm/transformers/MicroBlock_FixLoggerCrash.java

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2022 GregTech-6 Team
+ *
+ * This file is part of GregTech.
+ *
+ * GregTech is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GregTech is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GregTech. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package gregtech.asm.transformers;
+
+import gregapi.log.LoggerFML;
+import gregtech.asm.GT_ASM;
+import net.minecraft.launchwrapper.IClassTransformer;
+import org.apache.logging.log4j.Logger;
+import org.objectweb.asm.Opcodes;
+import org.objectweb.asm.tree.ClassNode;
+import org.objectweb.asm.tree.FieldInsnNode;
+import org.objectweb.asm.tree.InsnNode;
+import org.objectweb.asm.tree.MethodNode;
+
+/**
+ * @author Gregorius Techneticies
+ */
+public class MicroBlock_FixLoggerCrash implements IClassTransformer  {
+	public static Logger FAKE_LOGGER = new LoggerFML("FMB");
+
+	@Override
+	public byte[] transform(String name, String transformedName, byte[] basicClass) {
+		if (!transformedName.equals("codechicken.microblock.handler.MicroblockProxy")) return basicClass;
+		ClassNode classNode = GT_ASM.makeNodes(basicClass);
+
+		for (MethodNode m: classNode.methods) {
+			if (m.name.equals("logger")) {
+				GT_ASM.logger.info("Transforming codechicken.microblock.handler.MicroblockProxy.logger");
+				m.instructions.clear();
+				m.instructions.add(new FieldInsnNode(Opcodes.GETSTATIC, "gregtech/asm/transformers/MicroBlock_FixLoggerCrash", "FAKE_LOGGER", "Lorg/apache/logging/log4j/Logger;"));
+				m.instructions.add(new InsnNode(Opcodes.ARETURN));
+			}
+		}
+
+		return GT_ASM.writeByteArray(classNode);
+	}
+}