Batches are nor appearing in custom tabs for Modern theme.
They appear for default tabs like Home, Curriculum but not for custom tabs.
Can you please resolve this at the earliest
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I replicated the issue on my test setup, thanks for reporting this issue to us.
Marking this as a bug.
This will be fixed in the next update.
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This issue has been fixed in the wplms batches 1.5.2 version.
Also you might not need the quick fix for the modern theme added earlier in your website.
So now you can remove that fix and it will work normally.
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