diff --git a/src/lib/styles/stylesheet-processor.ts b/src/lib/styles/stylesheet-processor.ts
index da90f300b..3d9a0a8e4 100644
--- a/src/lib/styles/stylesheet-processor.ts
+++ b/src/lib/styles/stylesheet-processor.ts
@@ -118,6 +118,8 @@ export class StylesheetProcessor {
 
     const preset = cssnanoPresetDefault({
       svgo: false,
+      // Disable calc optimizations due to several issues.
+      calc: false,
     });
 
     const asyncPlugins = ['postcss-svgo'];