Trying to add a transaction with a new payee opens a window asking for "select autofill transaction", but showing only "opening balance" transaction -> cancel -> the payee's name formerly entered is deleted and the field remains blank. Afterwards, the transaction appears in ledger under the category's name, but sometimes it remains possible to add the payee's name, if it already exists.
Trying to add a transaction with a known payee and using auto-completion opens a window : "End transaction edit", which normally pops up only when we are somehow abandonning the edition (which of course is not the case). The window offers two options (discard or register) - should one choose one of them or the other, the app will crash.