When using bootstrap's accordion under tab, the errors badge is not displayed correctly

[quantavi]

We had to put accordion under the tabs, because we were showing possibly more than one item under the tab and it helps managing it. However now, if there is an error in collapsed form, the trestle doesn't show badge with correct number of errors, next to the tab name. I believe that it is caused by this selector

.is-invalid:not([type="hidden"])

from tabs.js file. Any idea how to fix this without braking of current behaviour?