Bug: New agenda filtering multiple tags broken [9.3.6 (9.3.6-29-g6a3dff-elpaplus @ /home/ionasal/.emacs.d/elpa/org-plus-contrib-20200406/)]

[Allen Li]

The new agenda filtering doesn't seem to work properly with multiple
tags.

Opening the file below, e.g., at /tmp/tmp.org

* TODO foo                                                              :foo:
* TODO bar                                                          :foo:bar:
* TODO baz

Open an agenda buffer M-x org-agenda RET < t

Filter / +foo-bar RET

I expect to see only

TODO foo

But instead I see all of the items, as if the filter was ignored.

Emacs  : GNU Emacs 26.3 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.10)
 of 2019-08-29
Package: Org mode version 9.3.6 (9.3.6-29-g6a3dff-elpaplus @ 
/home/ionasal/.emacs.d/elpa/org-plus-contrib-20200406/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-after-todo-state-change-hook '(org-checklist)
 org-columns-default-format "%60ITEM %TODO %Effort{:} %CLOCKSUM"
 org-agenda-skip-scheduled-if-deadline-is-shown t
 org-link-shell-confirm-function 'yes-or-no-p
 org-agenda-sticky t
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-refile-targets '((nil :maxlevel . 3) (org-agenda-files :maxlevel . 2))
 org-speed-commands-user '(("a" progn (forward-char 1) (call-interactively 
'org-insert-heading-respect-content) (org-demote)) ("N" . 
org-toggle-narrow-to-subtree))
 org-enforce-todo-dependencies t
 org-special-ctrl-k t
 org-checkbox-hierarchical-statistics nil
 org-export-use-babel nil
 org-edit-src-content-indentation 0
 org-special-ctrl-a/e t
 org-columns-modify-value-for-display-function 
'orgx-columns-remove-stars-for-display
 org-log-redeadline 'note
 org-modules '(org-bibtex org-docview org-eww org-gnus org-habit org-id 
org-info org-irc org-mhe org-protocol org-rmail org-w3m org-checklist 
org-depend)
 org-blocker-hook '(org-depend-block-todo 
org-block-todo-from-children-or-siblings-or-parent)
 org-id-link-to-org-use-id 'create-if-interactive
 org-clock-persist 'history
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-clock-string-limit 25
 org-clock-history-length 25
 org-agenda-persistent-filter t
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-adapt-indentation nil
 org-log-reschedule 'time
 org-agenda-text-search-extra-files '(agenda-archives)
 org-babel-pre-tangle-hook '(save-buffer)
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe 
org-babel-header-arg-expand)
 org-agenda-search-view-always-boolean t
 org-babel-load-languages '((dot . t) (emacs-lisp . t) (ledger . t) (python . 
t) (shell . t) (ditaa . t))
 org-log-done 'time
 org-agenda-skip-deadline-prewarning-if-scheduled 'pre-scheduled
 org-export-backends '(ascii html md texinfo)
 org-checklist-export-function 'org-export-as-ascii
 org-ellipsis "..."
 org-attach-store-link-p 'attached
 org-agenda-span 'day
 org-trigger-hook '(org-depend-trigger-todo)
 org-latex-packages-alist '(("" "siunitx" t))
 org-clock-into-drawer "CLOCK"
 org-clock-out-remove-zero-time-clocks t
 org-confirm-babel-evaluate nil
 org-use-sub-superscripts '{}
 org-use-speed-commands '(lambda nil (and (looking-at org-outline-regexp) 
(looking-back "^**")))
 org-agenda-todo-ignore-scheduled 'future
 org-ctrl-k-protect-subtree 'error
 org-agenda-skip-unavailable-files t
 )