What do you mean by "pushed off" ?
You step on the pressure plate, and then what exactly? The pillar sinks down but without her on it?
Difficult to understand what that can be...
Have you tried just replaying the level from the start again?
Verified files?

I've played this game lots of times and never had anything like that happen....

Facing the same issue. Did you manage to resolve it or find a workaround?

EDIT: For anyone who finds this, repeatedly clicking on the platform resulted in Ida finally getting on it instead of being bumped back, letting me complete the level.

Use the totem on the moving block

Encountered this bug a few times, Android version as well. I advise restarting the game and trying again. If it persists try verifying integrity of the game files.