diff --git a/ui/src/Stores/AlertStore.js b/ui/src/Stores/AlertStore.js
index eb0b1a972..e6025abb5 100644
--- a/ui/src/Stores/AlertStore.js
+++ b/ui/src/Stores/AlertStore.js
@@ -46,8 +46,11 @@ function DecodeLocationSearch(searchString) {
       if (parsed.q === "") {
         params.q = [];
       } else if (Array.isArray(parsed.q)) {
-        // filter out empty strings, so 'q=' doesn't end up [""] but rather []
-        params.q = parsed.q.filter(v => v !== "");
+        // first filter out duplicates
+        // then filter out empty strings, so 'q=' doesn't end up [""] but rather []
+        params.q = parsed.q
+          .filter((v, i) => parsed.q.indexOf(v) === i)
+          .filter(v => v !== "");
       } else {
         params.q = [parsed.q];
       }
diff --git a/ui/src/Stores/AlertStore.test.js b/ui/src/Stores/AlertStore.test.js
index 3f82a11a1..210ccba93 100644
--- a/ui/src/Stores/AlertStore.test.js
+++ b/ui/src/Stores/AlertStore.test.js
@@ -181,6 +181,13 @@ describe("DecodeLocationSearch", () => {
     });
   });
 
+  it("no value q[]=&q[]= search param is decoded correctly", () => {
+    expect(DecodeLocationSearch("?q=")).toMatchObject({
+      defaultsUsed: false,
+      params: { q: [] }
+    });
+  });
+
   it("single value q=foo search param is decoded correctly", () => {
     expect(DecodeLocationSearch("?q=foo")).toMatchObject({
       defaultsUsed: false,
@@ -201,6 +208,20 @@ describe("DecodeLocationSearch", () => {
       params: { q: ["foo", "bar"] }
     });
   });
+
+  it("multi value q[]=foo&q[]=bar&q[]=foo search param is decoded correctly", () => {
+    expect(DecodeLocationSearch("?q[]=foo&q[]=bar&q[]=foo")).toMatchObject({
+      defaultsUsed: false,
+      params: { q: ["foo", "bar"] }
+    });
+  });
+
+  it("multi value q[]=foo&q[]=&q[]=foo search param is decoded correctly", () => {
+    expect(DecodeLocationSearch("?q[]=foo&q[]=&q[]=foo")).toMatchObject({
+      defaultsUsed: false,
+      params: { q: ["foo"] }
+    });
+  });
 });
 
 describe("UpdateLocationSearch", () => {