save data function won't save "data overrides" setting

Hello, I'm writing a block where I read from a table then evaluate some data in a PHP function and at last save them using "Save Data". To do that I set up the Data overrides like this
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after saving it works fine but when I open the block again the situation is like this
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and so it doesn't work anymore, where I'm wrong with it?

Any idea?

this happens every time you open the form for editing ? which browser do you use ?
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could you please try v7 on the same website, check if has the same issue or not ?

Thanks Max, I work with Chrome but also tested Firefox and Safari with the same result, if I just save the block after editing the settings are immediately lost, if I use the save & close button it seems to work since the form works correctly but the first time the block is opened for editing the settings are reseted to default.
Sorry but I can't use v7 for now, I don't have time to study it in this period, I'll start using the new version after the Winter when I'll be less busy.

Hello Max
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I have the same Problem with "Data overrides" - Nothing happens

The form is very complex and switching to v7 is not an option. Is there a fix for V6?

Thx for Help
Corinne
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