I’ve also been having the same issues.
I’m using Insomnia (another type of postman) with bearer token.
Here’s the UI request:
project_id: 615263
engine: tm
approve_translated: 0
auto_approve_option: 1
skip_approved_translations: 0
apply_untranslated_strings_only: 0
match_relevance: 100
languages_list: 55,56,41,3
files_list: 720
UI generates 994 translations and 16,546 translations skipped, API call generates nothing.