diff --git a/rpcs3/Emu/Cell/Modules/sceNpTrophy.cpp b/rpcs3/Emu/Cell/Modules/sceNpTrophy.cpp
index 36932536c1..23f7248e16 100644
--- a/rpcs3/Emu/Cell/Modules/sceNpTrophy.cpp
+++ b/rpcs3/Emu/Cell/Modules/sceNpTrophy.cpp
@@ -18,6 +18,7 @@
 #include "Emu/Cell/lv2/sys_process.h"
 
 #include <cmath>
+#include <shared_mutex>
 #include "util/asm.hpp"
 
 LOG_CHANNEL(sceNpTrophy);
@@ -462,7 +463,7 @@ error_code sceNpTrophyRegisterContext(ppu_thread& ppu, u32 context, u32 handle,
 
 	const auto trophy_manager = g_fxo->get<sce_np_trophy_manager>();
 
-	reader_lock lock(trophy_manager->mtx);
+	std::shared_lock lock(trophy_manager->mtx);
 
 	if (!trophy_manager->is_initialized)
 	{
@@ -470,6 +471,7 @@ error_code sceNpTrophyRegisterContext(ppu_thread& ppu, u32 context, u32 handle,
 	}
 
 	const auto [ctxt, error] = trophy_manager->get_context_ex(context, handle);
+	const auto handle_ptr = idm::get<trophy_handle_t>(handle);
 
 	if (error)
 	{
@@ -529,13 +531,47 @@ error_code sceNpTrophyRegisterContext(ppu_thread& ppu, u32 context, u32 handle,
 	// * Installed
 
 	const std::string trophyPath = "/dev_hdd0/home/" + Emu.GetUsr() + "/trophy/" + ctxt->trp_name;
+	const s32 trp_status = fs::is_dir(vfs::get(trophyPath)) ? SCE_NP_TROPHY_STATUS_INSTALLED : SCE_NP_TROPHY_STATUS_NOT_INSTALLED;
+
+	lock.unlock();
+
+	sceNpTrophy.notice("sceNpTrophyRegisterContext(): Callback is being called (trp_status=%u)", trp_status);
 
 	// The callback is called once and then if it returns >= 0 the cb is called through events(coming from vsh) that are passed to the CB through cellSysutilCheckCallback
-	if (statusCb(ppu, context, fs::is_dir(vfs::get(trophyPath)) ? SCE_NP_TROPHY_STATUS_INSTALLED : SCE_NP_TROPHY_STATUS_NOT_INSTALLED, 0, 0, arg) < 0)
+	if (statusCb(ppu, context, trp_status, 0, 0, arg) < 0)
 	{
 		return SCE_NP_TROPHY_ERROR_PROCESSING_ABORTED;
 	}
 
+	std::unique_lock lock2(trophy_manager->mtx);
+
+	// Rerun error checks, the callback could have changed stuff by calling sceNpTrophy functions internally
+
+	if (!trophy_manager->is_initialized)
+	{
+		return SCE_NP_TROPHY_ERROR_NOT_INITIALIZED;
+	}
+
+	const auto [ctxt2, error2] = trophy_manager->get_context_ex(context, handle);
+
+	if (error2)
+	{
+		// Recheck for any errors, such as if AbortHandle was called
+		return error2;
+	}
+
+	// Paranoid checks: context/handler could have been destroyed and replaced with new ones with the same IDs
+	// Return an error for such cases
+	if (ctxt2 != ctxt)
+	{
+		return SCE_NP_TROPHY_ERROR_UNKNOWN_CONTEXT;
+	}
+
+	if (handle_ptr.get() != idm::check<trophy_handle_t>(handle))
+	{
+		return SCE_NP_TROPHY_ERROR_UNKNOWN_HANDLE;
+	}
+
 	if (!trp.Install(trophyPath))
 	{
 		sceNpTrophy.error("sceNpTrophyRegisterContext(): Failed to install trophy context '%s' (%s)", trophyPath, fs::g_tls_error);
@@ -557,6 +593,8 @@ error_code sceNpTrophyRegisterContext(ppu_thread& ppu, u32 context, u32 handle,
 		{ SCE_NP_TROPHY_STATUS_PROCESSING_COMPLETE, 0 }
 	};
 
+	lock2.unlock();
+
 	lv2_obj::sleep(ppu);
 
 	// Create a counter which is destroyed after the function ends