diff --git a/lib/index.js b/lib/index.js
index f9135b8..5122e1f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -15,7 +15,15 @@ async function discover(params, options = {}) {
     let resultParams;
     return sanitizeDiscoverParams(params)
         .then( sanitizedParams => {
-            resultParams = sanitizedParams;
+            resultParams = Object.assign({}, sanitizedParams);
+            // Passing an 'all' type subgenre (e.g. 'all-metal') in the discover url
+            // actually returns far fewer / zero results than without.
+            // The Bandcamp site also does not seem to include it in its discover requests...           
+            if (sanitizedParams.time !== undefined) {
+                // If 'time' exists in sanitized params, then we have an 'all' type subgenre
+                // - refer to sanitizeDiscoverParams()
+                delete sanitizedParams.subgenre;
+            }
             return utils.getDiscoverUrl(sanitizedParams);
         })
         .then( url => fetch(url) )
@@ -54,6 +62,8 @@ async function sanitizeDiscoverParams(params) {
             if (subgenreOptions) { // false if genre is 'all'
                 sanitized.subgenre = getOptionValue(subgenreOptions, params.subgenre);
             }
+            // 'Time' option only available when there is effectively no subgenre (e.g. genre is 'all'
+            // or subgenre is 'all-metal')
             const timeAllowed = sanitized.subgenre === undefined || sanitized.subgenre == subgenreOptions[0].value;
             if (timeAllowed) {
                 sanitized.time = getOptionValue(options.times, params.time);