Threadsafe + Autoreconnect is not thread safe

[MassiveBox]

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WARNING: DATA RACE
Read at 0x00c000158720 by goroutine 23:
  github.com/ziutek/mymysql/thrsafe.(*Conn).pinger()
      /root/pkg/mod/github.com/ziutek/[email protected]/thrsafe/thrsafe.go:76 +0x1a1

Previous write at 0x00c000158720 by goroutine 32:
  [failed to restore the stack]

Goroutine 23 (running) created at:
  github.com/ziutek/mymysql/thrsafe.(*Conn).Connect()
      /root/pkg/mod/github.com/ziutek/[email protected]/thrsafe/thrsafe.go:92 +0x118
  github.com/ziutek/mymysql/autorc.(*Conn).connectIfNotConnected()
      /root/pkg/mod/github.com/ziutek/[email protected]/autorc/autorecon.go:93 +0x96
  github.com/ziutek/mymysql/autorc.(*Conn).Query()
      /root/pkg/mod/github.com/ziutek/[email protected]/autorc/autorecon.go:134 +0x5b
  main.reopenSessions()
      /dir/whatsapp_auth.go:71 +0x76

On file dir/whatsapp_auth.go line 71 I have:
rows, _, _ := db.Query("SELECT user_id FROM wtg WHERE session != ''")
What am I missing?