Search in target segments randomly fails

Hello,

Sometimes, when searching more than once for a single word or expression in target, not all results are detected. The first search shows a number of results, but when repeating the search it detects only some of the previous instances (there's no pattern as to which ones).

This is worrying, as it leads to skip mistakes... How can I trust that the list of results is complete? Is there a way to make the search reliable?

I am working with Trados Studio 2022.

I hope someone can help.

Thanks and regards. 

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