upd

Author: GyverLibs

library.properties

@@ -1,5 +1,5 @@
 name=FastBot2
-version=1.2.2
+version=1.2.3
 author=AlexGyver <alex@alexgyver.ru>
 maintainer=AlexGyver <alex@alexgyver.ru>
 sentence=Fast and universal Arduino/ESP8266/ESP32 library for Telegram bot 

src/core/types/File.h

@@ -53,7 +53,7 @@ class File : protected Message {
     void makePacket(Packet& p) const {
         if (multipart.isFile()) {
             Message::makeQS(p);
-            if (caption.length()) p.addQS(tg_api::caption, caption);
+            if (caption.length()) p.addQS(tg_api::caption, su::url::encode(caption));
         } else {
             Message::makePacket(p);
             p[multipart.getType()] = multipart.getUrlid();

src/core/types/Message.h

@@ -139,7 +139,7 @@ class Message {
 
     void makeQS(Packet& p) const {
         p.addQS(tg_api::chat_id, chatID);
-        if (text.length()) p.addQS(tg_api::text, text);
+        if (text.length()) p.addQS(tg_api::text, su::url::encode(text));
         if (threadID >= 0) p.addQS(tg_api::message_thread_id, threadID);
         if (reply.messageID >= 0) {
             p.beginQS(tg_api::reply_parameters);