diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee42b9ed3..94b18d8f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,6 +41,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Bug fixes
 
+* Fixed numerous issues related to programmatically updating selectize options. (#2053)
+   * `update_selectize(options=...)` no longer gets ignored when `server=False` (the default).
+   * `update_selectize(options=...)` now works as expected in a module.
+
 * Fixed an issue with `update_selectize()` to properly display labels with HTML reserved characters like "&" (#1330)
 
 * Fixed an issue with `ui.Chat()` sometimes wanting to scroll a parent element. (#1996)
diff --git a/shiny/ui/_input_update.py b/shiny/ui/_input_update.py
index cad0af229..7395e764b 100644
--- a/shiny/ui/_input_update.py
+++ b/shiny/ui/_input_update.py
@@ -722,22 +722,20 @@ def update_selectize(
 
     session = require_active_session(session)
 
+    if options is not None:
+        cfg = tags.script(
+            json.dumps(options),
+            type="application/json",
+            data_for=resolve_id(id),
+            data_eval=json.dumps(extract_js_keys(options)),
+        )
+        session.send_input_message(id, {"config": cfg.get_html_string()})
+
     if not server:
         return update_select(
             id, label=label, choices=choices, selected=selected, session=session
         )
 
-    if options is not None:
-        cfg = TagList(
-            tags.script(
-                json.dumps(options),
-                type="application/json",
-                data_for=id,
-                data_eval=json.dumps(extract_js_keys(options)),
-            )
-        )
-        session.send_input_message(id, drop_none({"config": cfg.get_html_string()}))
-
     # Transform choices to a list of dicts (this is the form the client wants)
     # [{"label": "Foo", "value": "foo", "optgroup": "foo"}, ...]
     flat_choices: list[FlatSelectChoice] = []
diff --git a/tests/playwright/shiny/components/selectize/app.py b/tests/playwright/shiny/components/selectize/app.py
new file mode 100644
index 000000000..78f4400a5
--- /dev/null
+++ b/tests/playwright/shiny/components/selectize/app.py
@@ -0,0 +1,34 @@
+from shiny import App, Inputs, Outputs, Session, module, reactive, ui
+
+
+@module.ui
+def reprex_selectize_ui(label: str):
+    return ui.input_selectize("x", label, choices=[], multiple=True)
+
+
+@module.server
+def reprex_selectize_server(
+    input: Inputs, output: Outputs, session: Session, server: bool = True
+):
+    @reactive.effect
+    def _():
+        ui.update_selectize(
+            "x",
+            choices=[f"Foo {i}" for i in range(3)],
+            server=server,
+            options={"placeholder": "Search"},
+        )
+
+
+app_ui = ui.page_fluid(
+    reprex_selectize_ui("serverside", "Server"),
+    reprex_selectize_ui("clientside", "Client"),
+)
+
+
+def server(input: Inputs, output: Outputs, session: Session):
+    reprex_selectize_server("serverside", server=True)
+    reprex_selectize_server("clientside", server=False)
+
+
+app = App(app_ui, server, debug=True)
diff --git a/tests/playwright/shiny/components/selectize/test_selectize.py b/tests/playwright/shiny/components/selectize/test_selectize.py
new file mode 100644
index 000000000..27e9585be
--- /dev/null
+++ b/tests/playwright/shiny/components/selectize/test_selectize.py
@@ -0,0 +1,23 @@
+# import pytest
+from playwright.sync_api import Page, expect
+
+from shiny.playwright import controller
+from shiny.run import ShinyAppProc
+
+
+def test_selectize(page: Page, local_app: ShinyAppProc) -> None:
+    page.goto(local_app.url)
+
+    expect(page.get_by_placeholder("Search")).to_have_count(2)
+
+    selectize_menu = controller.InputSelectize(page, "serverside-x")
+    selectize_menu.expect_choices(["Foo 0", "Foo 1", "Foo 2"])
+    selectize_menu.expect_multiple(True)
+    selectize_menu.set(["Foo 0", "Foo 1"])
+    selectize_menu.expect_selected(["Foo 0", "Foo 1"])
+
+    selectize_menu2 = controller.InputSelectize(page, "clientside-x")
+    selectize_menu2.expect_choices(["Foo 0", "Foo 1", "Foo 2"])
+    selectize_menu2.expect_multiple(True)
+    selectize_menu2.set(["Foo 0", "Foo 1"])
+    selectize_menu2.expect_selected(["Foo 0", "Foo 1"])