There are now two pull requests proposing changes to quote toots inside private mentions (DM).

:github: [🟢 MERGED] When composing a DM, pasting a link will not create a quote: github.com/mastodon/mastodon/p
:github: [🟢 MERGED] When composing a DM, it'll not be sent if it quotes a toot from someone not mentioned: github.com/mastodon/mastodon/p

The fixes are now merged into Mastodon's source code prior to v4.5 release :neobread_checkmark:

0
0
0

If you have a fediverse account, you can quote this note from your own instance. Search https://bolha.one/users/cadusilva/statuses/115485894602339715 on your instance and quote it. (Note that quoting is not supported in Mastodon.)