The cursor randomly changes to box

[signifex]

In insert mode, the cursor changes (after a couple of seconds, or by pressing TAB) to a box from the default bar.
It started to happen after installing ess and lsp layers, but disabling them makes no effect.
Only when I left one layer (treemacs) installed, I cannot reproduce it.

How to fix this, very often confused in the current mode.

Spacemacs cursors also looks normal:

Value:
(("normal" "DarkGoldenrod2" box)
("insert" "chartreuse3"
(bar . 2))
("emacs" "SkyBlue2" box)
("hybrid" "SkyBlue2"
(bar . 2))
("replace" "chocolate"
(hbar . 2))
("evilified" "LightGoldenrod3" box)
("visual" "gray"
(hbar . 2))
("motion" "plum3" box)
("lisp" "HotPink1" box)
("iedit" "firebrick1" box)
("iedit-insert" "firebrick1"
(bar . 2)))

System Info 💻

• OS: gnu/linux
• Emacs: 27.1
• Spacemacs: 0.999.0
• Spacemacs branch: develop (rev. fd74970)
• Graphic display: nil
• Running in daemon: nil
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:
  ‘‘‘elisp
  (auto-completion
  (auto-completion :variables auto-completion-return-key-behavior ’complete auto-completion-tab-key-behavior ’cycle auto-completion-complete-with-key-sequence nil auto-completion-complete-with-key-sequence-delay 0.1 auto-completion-minimum-prefix-length 2 auto-completion-idle-delay 0.2 auto-completion-private-snippets-directory nil auto-completion-enable-snippets-in-popup nil auto-completion-use-company-box nil auto-completion-enable-snippets-in-popup t auto-completion-enable-help-tooltip t auto-completion-enable-sort-by-usage t)
  python emacs-lisp helm imenu-list ess
  (ess :variables ess-r-backend ’lsp ess-assign-key "\255")
  lsp spell-checking treemacs)

[lebensterben]

use gui emacs

[signifex]

Why? I feel more comfortable to use Spacemacs without GUI, and it worked fine until new layers were installed.

[signifex]

I removed auto-completion and lsp layers, and now spacemacs works fine. Still trying to install them, without this issue.