I can't honestly remember, it either lets you choose which file to keep or creates a copy. Might be that Dropbox and Nextcloud even behave differently. If I edit the file on mobile, I make a point of triggering the synchronization right after to avoid the problem.

If you're on Android, Keepass2Android [1] is an excellent app that implements the input with a special keyboard. This avoids risking your password via the clipboard. It even comes with a no-network-permission version!

[1] https://play.google.com/store/apps/details?id=keepass2androi...