The platform isn't multiple, actually on IOS
I tried to reproduce as far as the error you provided but it totally works.
Please check again!
You need fix your add-on!
We need more information eg screenshots, videos of how you did it!
Are you using the cracked version?
We need more video of your process!
Have you tried running the commands in the command array directly? (Not via function )
You need to take a screenshot and post it here as long as you don't use any addon!
You can try Logout and Login back Microsoft Account
You can reinstall and see if the problem is fixed!
Have you tried deleting data and reinstalling the game?
Try to exit and re-enter the game to see if it gets fixed!
I checked this issue on MCBE version 1.14.60 for android 8.1.0
And I think it does crash the game.Make arrangements like the screen shot I posted and add bonemeal to the dispenser.You activate the piston and you will immediately crash.
The game will thrown content log before enter to the world, unknown syntax, invalid syntax, ect at event definition because "trigger_event" accept string only, not array