diff --git a/src/core/achievements.cpp b/src/core/achievements.cpp
index b9d75f184..8b81324de 100644
--- a/src/core/achievements.cpp
+++ b/src/core/achievements.cpp
@@ -795,7 +795,7 @@ void Achievements::UpdateRichPresence(std::unique_lock<std::recursive_mutex>& lo
 
 #ifdef ENABLE_DISCORD_PRESENCE
   lock.unlock();
-  System::UpdateDiscordPresence();
+  System::UpdateDiscordPresence(false);
   lock.lock();
 #endif
 }
diff --git a/src/core/system.cpp b/src/core/system.cpp
index 5007caae5..40ad38257 100644
--- a/src/core/system.cpp
+++ b/src/core/system.cpp
@@ -234,6 +234,7 @@ static u64 s_session_start_time = 0;
 
 #ifdef ENABLE_DISCORD_PRESENCE
 static bool s_discord_presence_active = false;
+static time_t s_discord_presence_time_epoch;
 #endif
 
 static TinyString GetTimestampStringForFileName()
@@ -1691,7 +1692,7 @@ void System::ClearRunningGame()
   Achievements::GameChanged(s_running_game_path, nullptr);
 
 #ifdef ENABLE_DISCORD_PRESENCE
-  UpdateDiscordPresence();
+  UpdateDiscordPresence(true);
 #endif
 }
 
@@ -3372,7 +3373,7 @@ void System::UpdateRunningGame(const char* path, CDImage* image, bool booting)
     SaveStateSelectorUI::ClearList();
 
 #ifdef ENABLE_DISCORD_PRESENCE
-  UpdateDiscordPresence();
+  UpdateDiscordPresence(booting);
 #endif
 
   Host::OnGameChanged(s_running_game_path, s_running_game_serial, s_running_game_title);
@@ -4834,7 +4835,7 @@ void System::InitializeDiscordPresence()
   Discord_Initialize("705325712680288296", &handlers, 0, nullptr);
   s_discord_presence_active = true;
 
-  UpdateDiscordPresence();
+  UpdateDiscordPresence(true);
 }
 
 void System::ShutdownDiscordPresence()
@@ -4847,16 +4848,19 @@ void System::ShutdownDiscordPresence()
   s_discord_presence_active = false;
 }
 
-void System::UpdateDiscordPresence()
+void System::UpdateDiscordPresence(bool update_session_time)
 {
   if (!s_discord_presence_active)
     return;
 
+  if (update_session_time)
+    s_discord_presence_time_epoch = std::time(nullptr);
+
   // https://discord.com/developers/docs/rich-presence/how-to#updating-presence-update-presence-payload-fields
   DiscordRichPresence rp = {};
   rp.largeImageKey = "duckstation_logo";
   rp.largeImageText = "DuckStation PS1/PSX Emulator";
-  rp.startTimestamp = std::time(nullptr);
+  rp.startTimestamp = s_discord_presence_time_epoch;
   rp.details = "No Game Running";
   if (IsValidOrInitializing())
   {
diff --git a/src/core/system.h b/src/core/system.h
index 12b9de398..4685b7af8 100644
--- a/src/core/system.h
+++ b/src/core/system.h
@@ -480,7 +480,7 @@ void SetRunaheadReplayFlag();
 
 #ifdef ENABLE_DISCORD_PRESENCE
 /// Called when rich presence changes.
-void UpdateDiscordPresence();
+void UpdateDiscordPresence(bool update_session_time);
 #endif
 
 namespace Internal {