[bug] HTPASSWD middleware keeps removing itself

[e2489]

Description of the bug

I currently have HTPASSWD set up for SFTP (as passthrough doesn't work- https://github.com/mickael-kerjean/filestash/issues/600), and every so often I'll go to my frontend to be greeted by the normal SFTP login page. When I check the backend, the middleware has been completely removed, and needs to be set again. This has happened to me twice in the past week. I've made no changes on my end.

Step by step instructions to reproduce the bug

Set the HTPASSWD middleware for SFTP and try to log in. Eventually it will remove itself and stop working.

Can you replicate that error from the demo?

Can't check with the demo.

Observed behavior

I'm shown the normal SFTP login page.

Expected behavior

I should be shown the HTPASSWD user & password login page.