Can connect only upwards

i just tried to connect the output of a Frac (Value) to the input of a FormatValue (String) . This was not possible.

04:04:50 ERR : Error caught in the act: TAddFlow : Zugriffsverletzung bei Adresse 00608163 in Modul ‘vvvv.exe’. Lesen von Adresse C8032A00

Starting the connection the other way round was possible but had a strange effect: the Frac (Value) jumped just in the moment of connecting to a previous position!
never had something like this bevvvvore.

but reminds me sometimes to that bug with the keyboard node sometimes returning to the upper left after sáving…

i just had this again and tried to reproduce this.
no effort, sorry.