diff --git a/src/commands/deploy/deploy.ts b/src/commands/deploy/deploy.ts
index 2fbcb3211b0..7b85c210d40 100644
--- a/src/commands/deploy/deploy.ts
+++ b/src/commands/deploy/deploy.ts
@@ -37,6 +37,7 @@ import {
   logJson,
   warn,
   type APIError,
+  NETLIFYDEVWARN,
 } from '../../utils/command-helpers.js'
 import { DEFAULT_CONCURRENT_HASH, DEFAULT_DEPLOY_TIMEOUT } from '../../utils/deploy/constants.js'
 import { type DeployEvent, deploySite } from '../../utils/deploy/deploy-site.js'
@@ -944,6 +945,22 @@ const prepAndRunDeploy = async ({
 
   const deployFolder = await getDeployFolder({ command, options, config, site, siteData })
   const functionsFolder = getFunctionsFolder({ workingDir, options, config, site, siteData })
+  // When deploying without running a build, warn if build plugins are configured
+  // because their config mutations are lost without a build run
+  // (see https://github.com/netlify/cli/issues/3792).
+  if (!options.build) {
+    type ConfigPlugin = { package?: unknown; origin?: string }
+    const plugins =
+      (config?.plugins as ConfigPlugin[] | undefined) ??
+      (command.netlify.cachedConfig.config as { plugins?: ConfigPlugin[] } | undefined)?.plugins
+    const configuredPlugins = plugins?.filter((plugin) => plugin.origin !== 'default') ?? []
+    if (configuredPlugins.length > 0) {
+      log(
+        `${NETLIFYDEVWARN} Site uses build plugins (${configuredPlugins.map((p) => p.package).join(', ')}) but no build is being run.\n` +
+          `  Config changes made by these plugins will not be applied. Use ${chalk.cyanBright('netlify deploy --build')} to build and deploy together.`,
+      )
+    }
+  }
   const { configPath } = site
 
   // build flag wasn't used and edge functions directories exist
diff --git a/src/utils/redirects.ts b/src/utils/redirects.ts
index ffa925e1a8d..9f7a70d740a 100644
--- a/src/utils/redirects.ts
+++ b/src/utils/redirects.ts
@@ -36,6 +36,11 @@ const getErrorMessage = function ({ message }) {
 //  - `from` is called `origin`
 //  - `query` is called `params`
 //  - `conditions.role|country|language` are capitalized
+// Leading and trailing whitespace in `from` and `to` is trimmed so that typos
+// such as `to = " https://example.com"` do not silently break redirects
+// (see https://github.com/netlify/cli/issues/4707).
+const trimValue = (value) => (typeof value === 'string' ? value.trim() : value)
+
 const normalizeRedirect = function ({
   // @ts-expect-error TS(7031) FIXME: Binding element 'country' implicitly has an 'any' ... Remove this comment to see the full error message
   conditions: { country, language, role, ...conditions },
@@ -45,11 +50,15 @@ const normalizeRedirect = function ({
   query,
   // @ts-expect-error TS(7031) FIXME: Binding element 'signed' implicitly has an 'any' t... Remove this comment to see the full error message
   signed,
+  // @ts-expect-error TS(7031) FIXME: Binding element 'to' implicitly has an 'any type...
+  to,
   ...redirect
 }) {
   return {
     ...redirect,
-    origin: from,
+    origin: trimValue(from),
+    path: trimValue(from),
+    to: trimValue(to),
     params: query,
     conditions: {
       ...conditions,
diff --git a/tests/unit/utils/redirects.test.ts b/tests/unit/utils/redirects.test.ts
index 31492fd5da0..4484af07778 100644
--- a/tests/unit/utils/redirects.test.ts
+++ b/tests/unit/utils/redirects.test.ts
@@ -230,3 +230,29 @@ test('should parse redirect rules from _redirects file and netlify.toml', async
     expect(redirects).toEqual(expected)
   })
 })
+
+test('should trim leading and trailing whitespace from redirect `from` and `to`', async (t) => {
+  await withSiteBuilder(t, async (builder) => {
+    await builder
+      .withNetlifyToml({
+        config: {
+          redirects: [
+            {
+              from: ' /leading-space ',
+              status: 200,
+              to: ' https://www.netlify.com ',
+            },
+          ],
+        },
+      })
+      .build()
+
+    // @ts-expect-error TS(2345) FIXME: Argument of type '{ configPath: string; }' is not ... Remove this comment to see the full error message
+    const redirects = await parseRedirects({ configPath: `${builder.directory}/netlify.toml` })
+    expect(redirects[0]).toMatchObject({
+      origin: '/leading-space',
+      path: '/leading-space',
+      to: 'https://www.netlify.com',
+    })
+  })
+})