What did you expect to happen?
No indenting of lines when a line break occurs.
What actually happened?
After a soft line break (when the word hits the right window border), the line is indented with an invisible space (no tabs/spaces).
Additional details:

Steps to reproduce:
System information:
SYSTEM type gnu/linux
config x86_64-pc-linux-gnu
shell /bin/bash
uname Linux 4.19.147-1-MANJARO #1 SMP Wed Sep 23 18:00:56 UTC 2020 x86_64
path (~/.emacs.d/bin/ ~/.emacs.d/bin/ ~/.emacs.d/bin/ ~/.emacs.d/bin/ ~/.emacs.d/bin ~/go/bin ~/.rvm/bin ~/flutter/bin ~/.rvm/gems/ruby-2.5.3/bin ~/.rvm/gems/ruby-2.5.3@global/bin ~/.rvm/rubies/ruby-2.5.3/bin ~/.cargo/bin ~/.local/bin /usr/local/sbin /usr/local/bin /usr/bin /usr/lib/jvm/default/bin /usr/bin/site_perl /usr/bin/vendor_perl /usr/bin/core_perl ~/.rvm/bin /usr/lib/emacs/27.1/x86_64-pc-linux-gnu/)
EMACS dir ~/.emacs.d/
version 27.1
build Aug 28, 2020
buildopts --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib --localstatedir=/var --with-x-toolkit=gtk3 --with-xft --with-wide-int --with-modules --with-cairo --with-harfbuzz 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fno-plt' CPPFLAGS=-D_FORTIFY_SOURCE=2 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now
features XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD JSON PDUMPER LCMS2 GMP
traits (server-running envvar-file)
DOOM dir ~/.doom.d/
version 2.0.9
build HEAD -> develop b245abfe7 2020-10-06 14:38:32 -0400
elc-files 0
modules (:completion (company +auto) ivy :ui doom doom-dashboard doom-quit fill-column hl-todo indent-guides minimap modeline ophints (popup +defaults) treemacs vc-gutter vi-tilde-fringe workspaces :editor (evil +everywhere) file-templates fold snippets word-wrap :emacs dired electric undo vc :term vterm :checkers syntax spell grammar :tools ansible docker editorconfig (eval +overlay) lookup lsp magit make rgb :lang data (dart +flutter) emacs-lisp (go +lsp) json latex ledger markdown nix org (ruby +rails) rust sh yaml :config (default +bindings +smartparens))
packages ((hyperbole) (elpher) (org-journal) (org-roam))
unpin (n/a)
elpa (n/a)
I can confirm this bug. Not sure what causes it, though.
This is adaptive-wrap-prefix-mode in the :editor word-wrap module. I'll look into a fix when I can. PRs welcome.
Is this related to adaptive-wrap-extra-indent here?
Most helpful comment
This is
adaptive-wrap-prefix-modein the:editor word-wrapmodule. I'll look into a fix when I can. PRs welcome.