I have this bug with Lightning 3.3.1 on Thunderbird 31.1.2.
When writing new messages, Thunderbird hangs for 3-5 seconds, every 30 seconds. Uninstalling Lightning solves the problem.
As I see this bug had been around since 2012, and it is not solved, this makes me seriously reconsider using Thunderbird.
Since the price of Outlook has dropped significantly, I might just go back to Outlook altogether.
I have this bug with Lightning 3.3.1 on Thunderbird 31.1.2.
When writing new messages, Thunderbird hangs for 3-5 seconds, every 30 seconds. Uninstalling Lightning solves the problem.
As I see this bug had been around since 2012, and it is not solved, this makes me seriously reconsider using Thunderbird.
Since the price of Outlook has dropped significantly, I might just go back to Outlook altogether.