Always force spoiler initialization.

ui/effects/spoiler_mess.cpp

@@ -824,7 +824,7 @@ bool SpoilerAnimation::repaint(crl::time now) {
 	return true;
 }
 
-void PrepareTextSpoilerMask() {
+void PreloadTextSpoilerMask() {
 	PrepareDefaultSpoiler(
 		DefaultTextMask,
 		"text",
@@ -833,10 +833,14 @@ void PrepareTextSpoilerMask() {
 }
 
 const SpoilerMessCached &DefaultTextSpoilerMask() {
+	static const auto once = [&] {
+		PreloadTextSpoilerMask();
+		return 0;
+	}();
 	return WaitDefaultSpoiler(DefaultTextMask);
 }
 
-void PrepareImageSpoiler() {
+void PreloadImageSpoiler() {
 	const auto postprocess = [](std::unique_ptr<SpoilerMessCached> cached) {
 		Expects(cached != nullptr);
 
@@ -862,6 +866,10 @@ void PrepareImageSpoiler() {
 }
 
 const SpoilerMessCached &DefaultImageSpoiler() {
+	static const auto once = [&] {
+		PreloadImageSpoiler();
+		return 0;
+	}();
 	return WaitDefaultSpoiler(DefaultImageCached);
 }
 

ui/effects/spoiler_mess.h

@@ -109,9 +109,9 @@ private:
 [[nodiscard]] SpoilerMessCached GenerateSpoilerMess(
 	const SpoilerMessDescriptor &descriptor);
 
-void PrepareTextSpoilerMask();
+void PreloadTextSpoilerMask();
 [[nodiscard]] const SpoilerMessCached &DefaultTextSpoilerMask();
-void PrepareImageSpoiler();
+void PreloadImageSpoiler();
 [[nodiscard]] const SpoilerMessCached &DefaultImageSpoiler();
 
 } // namespace Ui