The OptParseModeMarkdown option does not work in the SendMessage function since 2.1.1

[chapvic]

The OptParseModeMarkdown option does not work in the SendMessage function since v2.1.1

Code:

bot := tbot.New(os.Getenv("TELEGRAM_TOKEN"))
c := bot.Client()
_, err := c.SendMessage(os.Getenv("CHAT_ID"), "Hello!", tbot.OptParseModeMarkdown)
if err != nil {
  log.Fatal(err)
}

Error:

Bad Request: can't parse entities: Character '!' is reserved and must be escaped with the preceding '\'

The program runs when using v2.1.0 and below