Form validation records from CondensedInlinePanel disappear

[bplociennik]

When I'm using CondensedInlinePanel in object and I will click save and form will not pass validation then records added in CondensedInlinePanel will disappear. When I change to normal InlinePanel everything works great.

Versions:

wagtail==2.9
wagtail-condensedinlinepanel==0.5.3

[it-management]

The same behavior in my case.

wagtail==2.14.2
wagtail-condensedinlinepanel==0.5.3