On Czech Wikipedia template {{Archivováno}} is a redirect to {{Archiv}}. But if you try:
pywikibot.Page(cswiki, 'Page with Archivováno').botMayEdit()
it returns True.
(for pywikibot.Page(cswiki, 'Page with Archiv').botMayEdit() it correctly returns False)
Solution 1: Add all redirects to edit_restricted_templates - uhh, sometimes there can be too many redirects
Solution 2: Process all redirects to templates listed in edit_restricted_templates automatically from page.py