Spam text message deleted on iPhone does not synchronize and delete on MacBook (iCloud text messages iMessage / SMS forwarding)

Hello, I received a spam text message a few days ago. No number was displayed, just the sender's name (a company. I didn't open the message, I knew it was spam because of the preview text.

I have enabled iCloud for iMessage and SMS forwarding so that the messages from my iPhone are also displayed/synchronized on my MacBook. When I delete a message, it is usually automatically deleted on the other device. This has always worked fine for messages (iMessage & SMS).

So I deleted the spam text messages unread on my iPhone. Unfortunately, it was not automatically deleted on my MacBook. The notification and the message were still there. I waited 2-3 days, restarted all devices, and started the synchronization manually via the “Sync again” button in the settings (both on the MacBook and on the iPhone). I also deleted everything from the message trash (recycle bin) on the iPhone. Unfortunately without success. Then I briefly deactivated and reactivated iCloud on the MacBook in the message settings. None of this worked.

Other messages are still synchronized normally and deleted everywhere as usual when I do this on one device. Except for the spam SMS. Then I right-clicked on the spam message without opening it and deleted it manually on my MacBook as well.

Now I'm worried that all my manual interventions in the otherwise automatically running synchronization (manually deleting the message twice or deactivating and activating iCloud, etc.) might have broken something in the synchronization of my iCloud? For example, is it now constantly trying to synchronize a deleted message even though it no longer exists?

Other messages and iCloud services are still syncing normally. I'm just worried that something is now constantly being loaded or synchronized in the background that is no longer there and is therefore using up resources and slowing down anything?

Are my worries unfounded or what do I need to consider? Many thanks in advance.