Have been using KeePassXC using multiple open databases on Debian Jessie and MacOS Sierra for the last 5 days. My main browser is Firefox and I have the PassiFox plugin installed and connected to KeePassXC. The KeePassHTTP is enabled and configured to use multiple databases at one.

Every now and then, around 7-8 times a day, I am getting a notification in Firefox that the encryption key is unrecognized and that I need to Re-connect to KeePass. At this point, none of the passwords in my 3 open databases are being found in Firefox. When I attempt to reconnect to KeePassXC I am asked for a new key association request. If I provide a name I already used before, I'm asked if I want to overwrite it. Then the passwords are accessible again.

Is this a known issue caused by having multiple open databases at once? Have already tried to use different names for the shared encryption key but it doesn't seem to make a difference.