diff --git a/src/ini_reader.h b/src/ini_reader.h
index 6b71b82..753bf6f 100644
--- a/src/ini_reader.h
+++ b/src/ini_reader.h
@@ -223,7 +223,7 @@ public:
         if(do_utf8_to_gbk && is_str_utf8(content))
             content = UTF8ToACP(content); //do conversion if flag is set
 
-        if(store_isolated_line)
+        if(store_isolated_line && isolated_items_section.size())
         {
             curSection = isolated_items_section; //items before any section define will be store in this section
             //check this section first
@@ -384,7 +384,7 @@ public:
         if(section != cached_section)
         {
             cached_section = section;
-            cached_section_content= ini_content.find(section);
+            cached_section_content = ini_content.find(section);
         }
         auto &cache = cached_section_content->second;
         return cache.find(itemName) != cache.end();
diff --git a/src/misc.cpp b/src/misc.cpp
index 65ca226..ec80884 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -677,7 +677,7 @@ bool regMatch(const std::string &src, const std::string &match)
 bool regFind(const std::string &src, const std::string &match)
 {
     jp::Regex reg;
-    reg.setPattern(match).addModifier("m").addPcre2Option(PCRE2_UTF).compile();
+    reg.setPattern(match).addModifier("m").addPcre2Option(PCRE2_UTF|PCRE2_ALT_BSUX).compile();
     if(!reg)
         return false;
     return reg.match(src, "g");
@@ -686,7 +686,7 @@ bool regFind(const std::string &src, const std::string &match)
 std::string regReplace(const std::string &src, const std::string &match, const std::string &rep, bool global)
 {
     jp::Regex reg;
-    reg.setPattern(match).addModifier("m").addPcre2Option(PCRE2_UTF|PCRE2_MULTILINE).compile();
+    reg.setPattern(match).addModifier("m").addPcre2Option(PCRE2_UTF|PCRE2_MULTILINE|PCRE2_ALT_BSUX).compile();
     if(!reg)
         return src;
     return reg.replace(src, rep, global ? "gx" : "x");
@@ -694,14 +694,15 @@ std::string regReplace(const std::string &src, const std::string &match, const s
 
 bool regValid(const std::string &reg)
 {
-    jp::Regex r(reg);
+    jp::Regex r;
+    r.setPattern(reg).addPcre2Option(PCRE2_UTF|PCRE2_ALT_BSUX).compile();
     return !!r;
 }
 
 int regGetMatch(const std::string &src, const std::string &match, size_t group_count, ...)
 {
     jp::Regex reg;
-    reg.setPattern(match).addModifier("m").addPcre2Option(PCRE2_UTF).compile();
+    reg.setPattern(match).addModifier("m").addPcre2Option(PCRE2_UTF|PCRE2_ALT_BSUX).compile();
     jp::VecNum vec_num;
     jp::RegexMatch rm;
     size_t count = rm.setRegexObject(&reg).setSubject(src).setNumberedSubstringVector(&vec_num).setModifier("g").match();
diff --git a/src/speedtestutil.cpp b/src/speedtestutil.cpp
index 37e386f..5e10043 100644
--- a/src/speedtestutil.cpp
+++ b/src/speedtestutil.cpp
@@ -2002,7 +2002,7 @@ void filterNodes(std::vector<nodeInfo> &nodes, string_array &exclude_remarks, st
 
     for(i = 0; i < exclude_remarks.size(); i++)
     {
-        std::unique_ptr<pcre2_code, decltype(&pcre2_code_free)> pattern(pcre2_compile(reinterpret_cast<const unsigned char*>(exclude_remarks[i].c_str()), PCRE2_ZERO_TERMINATED | PCRE2_MULTILINE, 0, &errornumber, &erroroffset, NULL), &pcre2_code_free);
+        std::unique_ptr<pcre2_code, decltype(&pcre2_code_free)> pattern(pcre2_compile(reinterpret_cast<const unsigned char*>(exclude_remarks[i].c_str()), exclude_remarks[i].size(), PCRE2_UTF | PCRE2_MULTILINE | PCRE2_ALT_BSUX, &errornumber, &erroroffset, NULL), &pcre2_code_free);
         if(!pattern)
             return;
         exclude_patterns.emplace_back(std::move(pattern));
@@ -2012,7 +2012,7 @@ void filterNodes(std::vector<nodeInfo> &nodes, string_array &exclude_remarks, st
     }
     for(i = 0; i < include_remarks.size(); i++)
     {
-        std::unique_ptr<pcre2_code, decltype(&pcre2_code_free)> pattern(pcre2_compile(reinterpret_cast<const unsigned char*>(include_remarks[i].c_str()), PCRE2_ZERO_TERMINATED | PCRE2_MULTILINE, 0, &errornumber, &erroroffset, NULL), &pcre2_code_free);
+        std::unique_ptr<pcre2_code, decltype(&pcre2_code_free)> pattern(pcre2_compile(reinterpret_cast<const unsigned char*>(include_remarks[i].c_str()), include_remarks[i].size(), PCRE2_UTF | PCRE2_MULTILINE | PCRE2_ALT_BSUX, &errornumber, &erroroffset, NULL), &pcre2_code_free);
         if(!pattern)
             return;
         include_patterns.emplace_back(std::move(pattern));