When I reply to an email, email address does not appear in To field automatically. I have to enter it manually. This issue started yesterday. I was using the version 45.2.0. I manage a few emails on Thunderbird. All of these emails belong to our company's domain. This issue happens only on one of these email accounts, not the others. I disabled all extensions and started Thunderbird on Safe Mod. It did not solve the issue. I automatically update Thunderbird on the background. Today, it updated to the latest version 45.3.0. I still see the problem. How can we solve this issue?