LOV does not return value to the base page sometimes

Hi,
I have created messageLOV type items. These LOVs do return value to the base page usually. We have a user in Uruguay who is trying to use the page which has the LOVs. He says the LOV takes a long time to return to the main page after he clicks on quick select and also the value does not get populated in the main page.
We have not been facing any such problem here in India. The LOV has been tested rigorously with no issues as such.
Can you please suggest a reason why such a problem is occuring? Expecting your replies soon
Thanks,
Priya

Thiyaga, did you read the devguide or the tutorial ?
Can you please give me the inputs about the creation of LOV and it requires how many lov mappings as mandatory?
This is there in the devguideHow to identify the mapping fields of an LOV which is already existing in the base page to reproduce in a similar way and need to do a customization on top of it ?
Open the page XML and you can find the LOV mappings.Tapash

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