I don't get any warning in the console when I open the thread.
Also, it seems it does not always happen the first time I open a thread (but always the next few times I try).
I am using an IMAP account. (And I could also reproduce on another computer with another IMAP account.)
I could not reproduce with thunderbird 68.4.1 installed from snap (with a new profile).
I don't get any warning in the console when I open the thread.
Also, it seems it does not always happen the first time I open a thread (but always the next few times I try).
I am using an IMAP account. (And I could also reproduce on another computer with another IMAP account.)
I could not reproduce with thunderbird 68.4.1 installed from snap (with a new profile).