Access violation at address - while opening body of package in editor 12.9.0.63

While trying to open a body of package in Editor from describe window I get following error

Access violation at address 00000000041A226E in module ‘Toad.exe’. Read of address 0000000000000002

after opening a new tab I get

Access violation at address 00000000041A226E in module ‘Toad.exe’. Read of address 0000000000000011

Then I opend another tab abd tried again - I managed to open it from tollbar - Load Object from database

after that opening a package body in describe window works even from those tabs where it previously failed

Was a log file produced?