Incomprehensible TM-Match during pre-translation

Question

Hi everyone, 
 I'm hoping someone can help me explain the following case I recently had. 
 I have a single TM for the language combination DE>FR for all my projects. My default project template is set to have as minimum TM match value 90%. 
 
 When pre-translating a new project, a segment was shown to me as 0% match, but I recognised the sentence from a previous project and I knew that I had already translated it in the past : 
 
 I then set in this new project the TM minimal match value to 80%, ran the pre-translation again, and suddenly the segment was 92% pretranslated:

Note: my previous project and this new project were both an .xliff file from the same client. I am using Trados 2022. 
 
 I don't understand why when the TM minimal value was set at 90%, the segment wasn't returned as 92% already translated ? 
 Does someone have maybe an explanation, because this does not make any sense to me? 
 
 Thank you in advance for all your feedback

Paul · Answer

Matthieu Waldburger 
 In all honesty I have no idea at all! I have never seen this before. I think I'd put this down to display issues if you're 100% sure it's all coming from your TM? 
 The only other thing I can think of would be if you'd used AI Professional and set the display to be a TM match set to be 0%, and this somehow took precedent over the TM match. Silly scenario but it's the only way I think you could influence the value in there on purpose. So probably more likely a glitch you'll never see again. 
 Maybe someone else has seen this and can offer an explanation?

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Incomprehensible TM-Match during pre-translation