spells – Mythic Black Tentacles vs. Freedom of Movement (pathfinder 1)

My group has a question about Mythic Black Tentacles vs. Freedom of Movement. For reference:

The important parts…

From Black Tentacles:

The tentacles can grapple creatures that are immune to grappling if that immunity is from a non-mythic source, but combat maneuver checks to grapple such creatures take a –5 penalty.

Freedom of Movement, broken down by me:

All combat maneuver checks made to grapple the target automatically fail.

The subject automatically succeeds on any combat maneuver checks and Escape Artist checks made to escape a grapple or a pin.

Our current thought is that if someone has FoM up and they’re hit with Mythic Black Tentacles, they can be grappled, because the text of MBT overrides Part1 from FoM.

But then, on their turn, they can automatically escape because of Point 2 from FoM.

Does anyone else have this in play? What do you do?

Thanks in advance.