Bot backend crashes when user sends "Hi" command (while not being in a tx)

[LucaBernstein]

bc_tg_bot | 2021/11/03 20:28:27 runtime error: index out of range [5] with length 5
bc_tg_bot | gopkg.in/tucnak/telebot%2ev2.(*Bot).debug
bc_tg_bot | 	/go/pkg/mod/gopkg.in/tucnak/telebot.v2@v2.4.0/util.go:14
bc_tg_bot | gopkg.in/tucnak/telebot%2ev2.(*Bot).deferDebug
bc_tg_bot | 	/go/pkg/mod/gopkg.in/tucnak/telebot.v2@v2.4.0/util.go:25
bc_tg_bot | runtime.gopanic
bc_tg_bot | 	/usr/local/go/src/runtime/panic.go:1038
bc_tg_bot | runtime.goPanicIndex
bc_tg_bot | 	/usr/local/go/src/runtime/panic.go:90
bc_tg_bot | github.com/LucaBernstein/beancount-bot-tg/bot.(*SimpleTx).Input
bc_tg_bot | 	/src/bot/transactionBuilder.go:120
bc_tg_bot | github.com/LucaBernstein/beancount-bot-tg/bot.(*BotController).handleTextState
bc_tg_bot | 	/src/bot/controller.go:146
bc_tg_bot | gopkg.in/tucnak/telebot%2ev2.(*Bot).handle.func1
bc_tg_bot | 	/go/pkg/mod/gopkg.in/tucnak/telebot.v2@v2.4.0/bot.go:569
bc_tg_bot | gopkg.in/tucnak/telebot%2ev2.(*Bot).runHandler.func1
bc_tg_bot | 	/go/pkg/mod/gopkg.in/tucnak/telebot.v2@v2.4.0/util.go:35
bc_tg_bot | runtime.goexit
bc_tg_bot | 	/usr/local/go/src/runtime/asm_amd64.s:1581