From 82ac1d56e0bcd0ac62c746b2fb74fe1c1f65b491 Mon Sep 17 00:00:00 2001
From: flop <flop@cttue.de>
Date: Fri, 22 May 2026 17:50:33 +0200
Subject: [PATCH] fix: sections change instead of deleteing

---
 ts/src/browser.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/ts/src/browser.ts b/ts/src/browser.ts
index f4c650d..0e6fc78 100644
--- a/ts/src/browser.ts
+++ b/ts/src/browser.ts
@@ -218,14 +218,17 @@ function setSectionField(si: number, key: string, val: any) {
 function setSectionType(si: number, sectionType: string) {
   const sec = getSectionByIndex(si);
   if (!sec) return;
+  const wasElementsSection = sec.sectionType !== MonoDisplay.SectionType.CustomFont;
   (sec as any).sectionType = MonoDisplay.StringToSectionType[sectionType as MonoDisplay.SectionTypeName];
   if ((sec as any).sectionType === MonoDisplay.SectionType.CustomFont) {
     (sec as any).fontData = new Uint8Array();
     delete (sec as any).elements;
     delete (sec as any).flags;
   } else {
-    (sec as any).elements = [];
-    (sec as any).flags = {};
+    if (!wasElementsSection) {
+      (sec as any).elements = [];
+      (sec as any).flags = {};
+    }
     delete (sec as any).fontData;
     if ((sec as any).sectionType === MonoDisplay.SectionType.ElementsTimespan) {
       const now = BigInt(Math.floor(Date.now() / 1000));