PLZ NEED HELP - quickform + meteor-update + autovalue


please guys i have been suffering for more than two days
i have the following scenario :

1- quickform
2- simpleschema ( attach schema to the collection not in quickform attribute )
3- using meteor-update + method
4- auto-value field ‘X’ to make some calculations on the server
using insert method is working fine and even the update is working as expected … here is the weird crazy thing that is going on

i have a method that update a particular field ‘Y’ in the collection
when i do the update, the auto-value field becomes NaN and ‘X’ is updated
when i revert back field X value … the auto-value field works and stored as expected

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Can you post some example code to illustrate the problem you’re running into?