I am not sure if I understand the issue - could you please tell me how to reproduce, Denis?

See screenshot (with included survey) : show hidden, but use disabled

Capture d’écran du 2020-12-24 09-51-33.png (11,113 bytes)   

Capture d’écran du 2020-12-24 09-51-33.png (11,113 bytes)   

Capture d’écran du 2020-12-24 09-51-40.png (23,088 bytes)   

Capture d’écran du 2020-12-24 09-51-40.png (23,088 bytes)   

Hey Denis, unfortunately (or fortunately? :) ), I can reproduce the issue only with your .lss . So far, everything looks good locally for me.

I think it's when array_filter_style is set to null

In 3.X : we don't save default value , in 4.X … we save default value , here import with value to null (not 0)

XML-with-issue.png (8,890 bytes)   

XML-with-issue.png (8,890 bytes)   

hmm, how can you set it to null in 3.x?
I tried, but I couldn't do it (I replicated the issue only with your .lss) - have more info?

In 3.X : array_filter_style are not exported … and it's really the best solution
I surely export this one with 4.2 or 4.3

Test TSV : no it's OK (there are another issue)

Fix committed to master branch: http://bugs.limesurvey.org/plugin.php?page=Source/view&id=30959

4.4.0-RC4

Fixed in Release 4.4.0+210129