Works as intended for me between my android phone and Kububtu PC however I deliberately turned it off for security reasons.

¿Why? Whenever I copy a password from my password manager on the PC it is shared to the Android phone and stored on the clip board there in plain unecrypted form. Since I also use a clip board manager app which remembers anything that is copied for later retrieval this means that if I were to lose my phone it would yield the finder with a long list of logins and passwords that I use.

I could of course manually delete each password from the smart phone after logging in but it's way too much of a hassle and I'm prone to simply forgetting it.

By default KDE connect should simply not transfer copies made from password managers. It bypasses the whole security feature that password managers have which automatically clears the clipboard a short time after copying any password. Last I checked there were feature requests // bug reports on github arounc issue. But I'm not tech savvy enough to know whether there is a programmatic way to detect what kind of app the copy is originating from or whether we are stuck with the current way by design constraint.