exclGroup: something is rotten in the acrobat 10

[kuopching]

Hi,

i've found interesting acrobat "feature". I made up xfa form for submission with  2 required fields and 2 radiobuttons between them [1] with the hierarchy [2]

When i click on submit button only 1.textfield complain about missing value.2nd textfield is just ignored. When I move 2nd. textfield above radiobuttons in hierarchy tree[3] everything works like charm. In Reader DC everything works as expected.Also when i change formproperties->Defaults->targetVersion from  10+ to 9.1+ even in acrobat validation works. Does someone find acceptable workaroud for this feature?( solution is not, dont use acrobat version 10) .Thank you

Configuration

Adobe Designer ES4 11.0.1.20...

Adobe Acrobat X Pro 10.1.16 - affected version​

xfa-template 3.3

Disclaimer: I've reinstalled acrobat and have most updated patches

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