diff --git a/frontend/app/player/MessageDistributor/managers/AssistManager.ts b/frontend/app/player/MessageDistributor/managers/AssistManager.ts
index d979d52f8..dc32bb4bb 100644
--- a/frontend/app/player/MessageDistributor/managers/AssistManager.ts
+++ b/frontend/app/player/MessageDistributor/managers/AssistManager.ts
@@ -181,7 +181,6 @@ export default class AssistManager {
         }
 
         for (let msg = reader.readNext();msg !== null;msg = reader.readNext()) {
-          //@ts-ignore
           if (this.jumped) {
             // @ts-ignore
             msg.time = this.md.getLastRecordedMessageTime() + msg.time
diff --git a/frontend/app/player/MessageDistributor/managers/DOM/DOMManager.ts b/frontend/app/player/MessageDistributor/managers/DOM/DOMManager.ts
index 39c1dab87..7dc7c4261 100644
--- a/frontend/app/player/MessageDistributor/managers/DOM/DOMManager.ts
+++ b/frontend/app/player/MessageDistributor/managers/DOM/DOMManager.ts
@@ -15,6 +15,7 @@ import {
   PostponedStyleSheet,
 } from './VirtualDOM';
 import type { StyleElement } from './VirtualDOM';
+import { insertRule, deleteRule } from './safeCSSRules';
 
 
 type HTMLElementWithValue = HTMLInputElement | HTMLTextAreaElement | HTMLSelectElement
@@ -32,27 +33,6 @@ const ATTR_NAME_REGEXP = /([^\t\n\f \/>"'=]+)/; // regexp costs ~
 //     .replace(/\-webkit\-/g, "")
 // }
 
-function insertRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { rule: string, index: number }) {
-  try {
-    sheet.insertRule(msg.rule, msg.index)
-  } catch (e) {
-    logger.warn(e, msg)
-    try {
-      sheet.insertRule(msg.rule, 0)
-      logger.warn("Inserting rule into 0-index", e, msg)
-    } catch (e) {
-      logger.warn("Cannot insert rule.", e, msg)
-    }
-  }
-}
-
-function deleteRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { index: number }) {
-  try {
-    sheet.deleteRule(msg.index)
-  } catch (e) {
-    logger.warn(e, msg)
-  }
-}
 
 export default class DOMManager extends ListWalker<Message> {
   private vTexts: Map<number, VText> = new Map() // map vs object here?
diff --git a/frontend/app/player/MessageDistributor/managers/DOM/StylesManager.ts b/frontend/app/player/MessageDistributor/managers/DOM/StylesManager.ts
index f26d8e5ea..b6dddcdd9 100644
--- a/frontend/app/player/MessageDistributor/managers/DOM/StylesManager.ts
+++ b/frontend/app/player/MessageDistributor/managers/DOM/StylesManager.ts
@@ -1,7 +1,7 @@
 import type StatedScreen from '../../StatedScreen';
-import type { CssInsertRule, CssDeleteRule, ReplaceVcss } from '../../messages';
+import type { CssInsertRule, CssDeleteRule } from '../../messages';
 
-type CSSRuleMessage = CssInsertRule | CssDeleteRule | ReplaceVcss;
+type CSSRuleMessage = CssInsertRule | CssDeleteRule;
 
 import ListWalker from '../ListWalker';
 
diff --git a/frontend/app/player/MessageDistributor/managers/DOM/VirtualDOM.ts b/frontend/app/player/MessageDistributor/managers/DOM/VirtualDOM.ts
index 5efa2ddf1..1be12d68c 100644
--- a/frontend/app/player/MessageDistributor/managers/DOM/VirtualDOM.ts
+++ b/frontend/app/player/MessageDistributor/managers/DOM/VirtualDOM.ts
@@ -2,6 +2,8 @@ type VChild = VElement | VText
 
 export type VNode = VDocument | VShadowRoot | VElement | VText
 
+import { insertRule, deleteRule } from './safeCSSRules';
+
 abstract class VParent {
 	abstract node: Node | null
 	protected children: VChild[] = []
@@ -182,11 +184,11 @@ export class PostponedStyleSheet {
 	}
 
 	insertRule(rule: string, index: number) {
-		this.applyCallback(s => s.insertRule(rule, index))
+		this.applyCallback(s => insertRule(s, { rule, index }))
 	}
 
 	deleteRule(index: number) {
-		this.applyCallback(s => s.deleteRule(index))
+		this.applyCallback(s => deleteRule(s, { index }))
 	}
 }
 
diff --git a/frontend/app/player/MessageDistributor/managers/DOM/safeCSSRules.ts b/frontend/app/player/MessageDistributor/managers/DOM/safeCSSRules.ts
new file mode 100644
index 000000000..a65c0cf6c
--- /dev/null
+++ b/frontend/app/player/MessageDistributor/managers/DOM/safeCSSRules.ts
@@ -0,0 +1,25 @@
+import logger from 'App/logger';
+
+export type { PostponedStyleSheet } from './VirtualDOM'
+
+export function insertRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { rule: string, index: number }) {
+  try {
+    sheet.insertRule(msg.rule, msg.index)
+  } catch (e) {
+    logger.warn(e, msg)
+    try {
+      sheet.insertRule(msg.rule, 0)
+      logger.warn("Inserting rule into 0-index", e, msg)
+    } catch (e) {
+      logger.warn("Cannot insert rule.", e, msg)
+    }
+  }
+}
+
+export function deleteRule(sheet: CSSStyleSheet | PostponedStyleSheet, msg: { index: number }) {
+  try {
+    sheet.deleteRule(msg.index)
+  } catch (e) {
+    logger.warn(e, msg)
+  }
+}