diff --git a/packages/server/src/jsRunner/tests/isolatedVM.spec.ts b/packages/server/src/jsRunner/tests/isolatedVM.spec.ts
index 5a9bc05d76..63a1a52b09 100644
--- a/packages/server/src/jsRunner/tests/isolatedVM.spec.ts
+++ b/packages/server/src/jsRunner/tests/isolatedVM.spec.ts
@@ -107,4 +107,15 @@ describe("Test isolated vm directly", () => {
     )
     expect(result).toEqual([])
   })
+
+  it("should ensure error results are cleared between runs", () => {
+    const context = {}
+    // throw error
+    // Ensure the first execution throws an error
+    expect(() => runJSWithIsolatedVM(`test.foo.bar = 123`, context)).toThrow()
+
+    // Ensure the error is not persisted across VMs
+    const secondResult = runJSWithIsolatedVM(`return {}`, context)
+    expect(secondResult).toEqual({})
+  })
 })
diff --git a/packages/server/src/jsRunner/vm/isolated-vm.ts b/packages/server/src/jsRunner/vm/isolated-vm.ts
index 37ee048dc2..b47137bcba 100644
--- a/packages/server/src/jsRunner/vm/isolated-vm.ts
+++ b/packages/server/src/jsRunner/vm/isolated-vm.ts
@@ -186,6 +186,7 @@ export class IsolatedVM implements VM {
 
     code = `
       try {
+        results = {}
         results['${this.runResultKey}']=${this.codeWrapper(code)}
       } catch (e) {
         results['${this.runErrorKey}']=e
diff --git a/packages/server/src/utilities/csv.ts b/packages/server/src/utilities/csv.ts
index 43d712165a..ac9304b12a 100644
--- a/packages/server/src/utilities/csv.ts
+++ b/packages/server/src/utilities/csv.ts
@@ -1,22 +1,52 @@
 import csv from "csvtojson"
 
 export async function jsonFromCsvString(csvString: string) {
-  const castedWithEmptyValues = await csv({ ignoreEmpty: true }).fromString(
-    csvString
-  )
+  const possibleDelimiters = [",", ";", ":", "|", "~", "\t", " "]
 
-  // By default the csvtojson library casts empty values as empty strings. This
-  // is causing issues on conversion.  ignoreEmpty will remove the key completly
-  // if empty, so creating this empty object will ensure we return the values
-  // with the keys but empty values
-  const result = await csv({ ignoreEmpty: false }).fromString(csvString)
-  result.forEach((r, i) => {
-    for (const [key] of Object.entries(r).filter(([, value]) => value === "")) {
-      if (castedWithEmptyValues[i][key] === undefined) {
-        r[key] = null
+  for (let i = 0; i < possibleDelimiters.length; i++) {
+    let headers: string[] | undefined = undefined
+    let headerMismatch = false
+
+    try {
+      // By default the csvtojson library casts empty values as empty strings. This
+      // is causing issues on conversion.  ignoreEmpty will remove the key completly
+      // if empty, so creating this empty object will ensure we return the values
+      // with the keys but empty values
+      const result = await csv({
+        ignoreEmpty: false,
+        delimiter: possibleDelimiters[i],
+      }).fromString(csvString)
+      for (const [, row] of result.entries()) {
+        // The purpose of this is to find rows that have been split
+        // into the wrong number of columns - Any valid .CSV file will have
+        // the same number of colums in each row
+        // If the number of columms in each row is different to
+        // the number of headers, this isn't the right delimiter
+        const columns = Object.keys(row)
+        if (headers == null) {
+          headers = columns
+        }
+        if (headers.length === 1 || headers.length !== columns.length) {
+          headerMismatch = true
+          break
+        }
+
+        for (const header of headers) {
+          if (row[header] === undefined || row[header] === "") {
+            row[header] = null
+          }
+        }
       }
+      if (headerMismatch) {
+        continue
+      } else {
+        return result
+      }
+    } catch (err) {
+      // Splitting on the wrong delimiter sometimes throws CSV parsing error
+      // (eg unterminated strings), which tells us we've picked the wrong delimiter
+      continue
     }
-  })
-
-  return result
+  }
+  throw new Error("Unable to determine delimiter")
 }
diff --git a/packages/server/src/utilities/tests/csv.spec.ts b/packages/server/src/utilities/tests/csv.spec.ts
index 14063d0e8e..b1dc192bf0 100644
--- a/packages/server/src/utilities/tests/csv.spec.ts
+++ b/packages/server/src/utilities/tests/csv.spec.ts
@@ -29,5 +29,34 @@ describe("csv", () => {
         expect(Object.keys(r)).toEqual(["id", "optional", "title"])
       )
     })
+
+    const possibleDelimeters = [",", ";", ":", "|", "~", "\t", " "]
+
+    const csvArray = [
+      ["id", "title"],
+      ["1", "aaa"],
+      ["2", "bbb"],
+      ["3", "c ccc"],
+      ["", ""],
+      [":5", "eee5:e"],
+    ]
+
+    test.each(possibleDelimeters)(
+      "Should parse with delimiter %s",
+      async delimiter => {
+        const csvString = csvArray
+          .map(row => row.map(col => `"${col}"`).join(delimiter))
+          .join("\n")
+        const result = await jsonFromCsvString(csvString)
+
+        expect(result).toEqual([
+          { id: "1", title: "aaa" },
+          { id: "2", title: "bbb" },
+          { id: "3", title: "c ccc" },
+          { id: null, title: null },
+          { id: ":5", title: "eee5:e" },
+        ])
+      }
+    )
   })
 })