diff --git a/PowerEditor/installer/nativeLang/english.xml b/PowerEditor/installer/nativeLang/english.xml
index a327a612c..36c7afd40 100644
--- a/PowerEditor/installer/nativeLang/english.xml
+++ b/PowerEditor/installer/nativeLang/english.xml
@@ -1514,7 +1514,7 @@ Do you want to continue?"/>
 please give another one."/>
 			<UDLRemoveCurrentLang title="Remove the current language" message="Are you sure?"/>
 			<SCMapperDoDeleteOrNot title="Are you sure?" message="Are you sure you want to delete this shortcut?"/>
-			<FindCharRangeValueError title="Range Value problem" message="You should type between 0 and 255."/>
+			<FindCharRangeValueError title="Range Value problem" message="You should type between 0 and 255."/> <!-- HowToReproduce: Search menu, then Find characters in range, select Custom range, enter 999 in either edit box, press Find. -->
 			<OpenInAdminMode title="Save failed" message="The file cannot be saved and it may be protected.
 Do you want to launch Notepad++ in Administrator mode?"/>
 			<OpenInAdminModeWithoutCloseCurrent title="Save failed" message="The file cannot be saved and it may be protected.
@@ -1555,6 +1555,8 @@ Press the OK button to open the Find dialog or set focus on it.
 			
 If you require the backward regex searching feature, consult the user manual for instructions on enabling it."/>
 			<PrintError title="0" message="Cannot start printer document."/><!-- Use title="0" to use Windows OS default translated "Error" title. -->
+			<FindAutoChangeOfInSelectionWarning title="Search warning" message="The &quot;In selection&quot; checkbox state has been automatically modified.
+Please verify the search condition before performing the action."/> <!-- HowToReproduce: https://github.com/notepad-plus-plus/notepad-plus-plus/issues/14897#issuecomment-2564316224 -->
 		</MessageBox>
 		<ClipboardHistory>
 			<PanelTitle name="Clipboard History"/>
diff --git a/PowerEditor/installer/nativeLang/english_customizable.xml b/PowerEditor/installer/nativeLang/english_customizable.xml
index baeb2d463..7c0173c15 100644
--- a/PowerEditor/installer/nativeLang/english_customizable.xml
+++ b/PowerEditor/installer/nativeLang/english_customizable.xml
@@ -1512,7 +1512,7 @@ Do you want to continue?"/>
 please give another one."/>
 			<UDLRemoveCurrentLang title="Remove the current language" message="Are you sure?"/>
 			<SCMapperDoDeleteOrNot title="Are you sure?" message="Are you sure you want to delete this shortcut?"/>
-			<FindCharRangeValueError title="Range Value problem" message="You should type between 0 and 255."/>
+			<FindCharRangeValueError title="Range Value problem" message="You should type between 0 and 255."/> <!-- HowToReproduce: Search menu, then Find characters in range, select Custom range, enter 999 in either edit box, press Find. -->
 			<OpenInAdminMode title="Save failed" message="The file cannot be saved and it may be protected.
 Do you want to launch Notepad++ in Administrator mode?"/>
 			<OpenInAdminModeWithoutCloseCurrent title="Save failed" message="The file cannot be saved and it may be protected.
@@ -1553,6 +1553,8 @@ Press the OK button to open the Find dialog or set focus on it.
 			
 If you require the backward regex searching feature, consult the user manual for instructions on enabling it."/>
 			<PrintError title="0" message="Cannot start printer document."/><!-- Use title="0" to use Windows OS default translated "Error" title. -->
+			<FindAutoChangeOfInSelectionWarning title="Search warning" message="The &quot;In selection&quot; checkbox state has been automatically modified.
+Please verify the search condition before performing the action."/> <!-- HowToReproduce: https://github.com/notepad-plus-plus/notepad-plus-plus/issues/14897#issuecomment-2564316224 -->
 		</MessageBox>
 		<ClipboardHistory>
 			<PanelTitle name="Clipboard History"/>
diff --git a/PowerEditor/src/ScintillaComponent/FindReplaceDlg.cpp b/PowerEditor/src/ScintillaComponent/FindReplaceDlg.cpp
index c68d36c41..db26aaaa2 100644
--- a/PowerEditor/src/ScintillaComponent/FindReplaceDlg.cpp
+++ b/PowerEditor/src/ScintillaComponent/FindReplaceDlg.cpp
@@ -1692,6 +1692,8 @@ intptr_t CALLBACK FindReplaceDlg::run_dlgProc(UINT message, WPARAM wParam, LPARA
 
 		case WM_ACTIVATE :
 		{
+			bool isInSelectionAutoChange = false;
+
 			if (LOWORD(wParam) == WA_ACTIVE || LOWORD(wParam) == WA_CLICKACTIVE)
 			{
 				Sci_CharacterRangeFull cr = (*_ppEditView)->getSelection();
@@ -1709,6 +1711,7 @@ intptr_t CALLBACK FindReplaceDlg::run_dlgProc(UINT message, WPARAM wParam, LPARA
 				enableFindDlgItem(IDC_IN_SELECTION_CHECK, inSelEnabled);
 
 				bool inSelChecked = isCheckedOrNot(IDC_IN_SELECTION_CHECK);
+				bool origInSelChecked = inSelChecked;
 
 				const NppGUI& nppGui = (NppParameters::getInstance()).getNppGUI();
 				if (nppGui._inSelectionAutocheckThreshold != 0)
@@ -1720,6 +1723,29 @@ intptr_t CALLBACK FindReplaceDlg::run_dlgProc(UINT message, WPARAM wParam, LPARA
 					setChecked(IDC_IN_SELECTION_CHECK, inSelChecked);
 				}
 
+				/*
+				In the scenario where the user clicks the action button (Count, 
+				Find All in Current Document, Replace All, Mark All, or Clear All marks) 
+				without activating the Find/Replace dialog, the "In Selection" checkbox could 
+				be auto-changed after the button click. To prevent the search from running with 
+				this unintended state, the search message has been removed from the queue. 
+				Then, launch a message box to alert the user that the search didn't run and 
+				they need to verify the settings.
+				*/
+				if (inSelChecked != origInSelChecked)
+				{
+					const std::vector<int> inSelActionIds = { IDCCOUNTALL, IDC_FINDALL_CURRENTFILE, IDREPLACEALL, IDCMARKALL, IDC_CLEAR_ALL };
+					for (const auto& id : inSelActionIds)
+					{
+						MSG msg;
+						if (PeekMessage(&msg, ::GetDlgItem(_hSelf, id), 0, 0, PM_REMOVE))
+						{
+							isInSelectionAutoChange = true;
+							break;
+						}
+					}
+				}
+
 				_options._isInSelection = inSelEnabled && inSelChecked;
 			}
 
@@ -1746,7 +1772,21 @@ intptr_t CALLBACK FindReplaceDlg::run_dlgProc(UINT message, WPARAM wParam, LPARA
 			{
 				enableFindDlgItem(IDREDOTMATCHNL, false);
 			}
+
 			enableProjectCheckmarks();
+
+			if (isInSelectionAutoChange)
+			{
+				NppParameters& nppParamInst = NppParameters::getInstance();
+				(nppParamInst.getNativeLangSpeaker())->messageBox(
+					"FindAutoChangeOfInSelectionWarning",
+					_hSelf,
+					L"The \"In selection\" checkbox state has been automatically modified.\r\n"
+					L"Please verify the search condition before performing the action.",
+					L"Search warning",
+					MB_OK | MB_APPLMODAL);
+			}
+
 			return 0;
 		}