'Kanban and calendar view disappeared from Odoo in Projects module

we have made several changes in our Odoo 14 CE and project.task.kanban and project.task.calendar views disappeared.
They are still in the settings -> views and I tried to revert everything to be the same as before the changes.

Also from backend we get both these views in project.task view: view_type:"kanban,list,form,calendar,pivot,graph,activity"
I also rollbacked the permissions to previous state and that also didn't help.
Do you have any clue what could be the issue?

Thanks for help!



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