If these problems only occur exactly after you upgraded KeePass, the most likely explanation is that you now have more than one KeePass installation and/or you removed KeePassRPC when uninstalling the older version.
It doesn’t appear as though there is anything fundamentally broken when using KeePass 2.43 so I would recommend looking at the above suggestion and the general troubleshooting guide rather than waiting for a “fix” that probably won’t arrive.