The "reply" window of Mastodon that is shown when the account you're replying to is on an another Mastodon instance.
https://geveze.social/system/media_attachments/files/109/597/011/211/182/514/original/52a0e8366ec9a208.webp
I can reply to you without issues when I use an app. However, when I use a browser, I need to copy/paste the URL of the post to the search field of my Mastodon instance (because we are on different instances).
See attached screenshot for the screen that I get when I try to reply to you via the browser. Same story for when I click on 'follow'.
Thanks for mentioning FediAct, will check that out.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.