Hi,
*Do you think that tracker helpdesk help you out oneday? You may download torrents and these torrents are NOT reported to the tracker from your client properly, so there is no way except helpdesk to complaint.
*This error affects everything in YOUR account, regarding bonus points system, upload, download and surely RATIO. So you need to do one of these steps:

1- Check torrents which already have errors, maybe pieces error or something another.

2- Check DTH and LPX which are disabled

3- Force recheck for your curreny torrents to enable client report torrents to tracker properly.

Note: when client stop reporting torrents to tracker, bonus point malfunctions from working.

A real life instance strengthening point of view (an example)
https://imgur.com/j3ryJKq
three steps for troubleshooting

Open your client, highlight one of your torrents that are not seeding, click the tracker tab at the bottom, and check for any errors and to be sure the tracker announce is working.

An example, https://imgur.com/kn5CcsB

If you changed the passkey and the old one is no longer valid. so what you need to do, on all of your torrents in your client, is to update the Tracker URL from the old passkey to the new and active. This is Unique to you, so don't share this with anyone.

If you don't know how to update the Tracker url in qbit client or don't feel comfortable doing so, your other option is to delete the offending torrents but not their data (important!!) and download your snatched torrents again. Since the data is already present, this will not affect your download/ratio stats, but the newly downloaded ones will automatically have the correct Tracker URL.