Hi Zorken66,
It is a known issue, that when use Calendar view in Task list, the filter with [Today] or [Me]. And this happens only in task list. To deal with this issue, as a workaround.
You can create a "Custom List", enable content type management on this list using the list settings page => advanced settings, add the "Task" site content type to the list, remove the default "Item" content
type from the list.
Please inform me freely if you have any questions.
Thanks