Assegnate 4 su 5 stelle

in most recent 45.? and 52.?, email address autocomplete does not work any longer. The autocomplete list comes up for a short moment, but goes away and only the typed letters are there. Any ideas what could cause this? Conflict with other addons? To get autocomplete back: either safe mode or disable cardbook (Win 10 32 bit)
Thanks

Questa recensione riguarda una versione precedente (19.1) del componente aggiuntivo. 

may you contact me by email : cardbook.thunderbird @ gmail.com ?