The Source texts between in the sdlxliff and translation memory's TU is perfectly same, but the matching score appears 99%, not 100%

Question

Hello All 
 
 Today, I'd like to get your advice for the issue that I have experienced. 
 Before describing the situation, I'll share the version info of Trados Studio. 
 Currently, I'm using the Trados Studio 2019 SR2 15.2.8.3007 (the latest for Trados 2019) 
 And the penalty setting is like below.

When I get the request from the client and analyzed the file with the Translation memory (TM), there's a same English text between in the source file and TM's TU. 
 Therefore, it should have been locked as CM or 100% match, but it appears 99% match. 
 So, when I moved and hover the cursor on the score, it says just 'score: 99'. 
 
 As you can see, the source text between in the source and TM's TU is perfectly same, but the trados didn't confirm it as 100% or CM. 
 I just compared both texts using Excel formula and it says also those two are same. 
 
 And when I copied the text from the TM and using find function in the sdlxliff, the text matches with the one in the source too. 
 
 Therefore, I guess it's not a problem with formatting. But don't know the reason why this issue happens. 
 So, any professional advice would be welcomed:). 
 Look forward to get useful comments soon.

Paul · Answer

E-Global E-Global 
 E-Global E-Global said: Currently, I'm using the Trados Studio 2019 SR2 15.2.8.3007 (the latest for Trados 2019) 
 There is always the possibility that the problem comes from this version. It may be the latest 2019 but it is still out of support as it's two major versions behind. 
 However, maybe we can investigate a little. Can you create a simple text file (*.txt) with that sentence in it and create a project using the same TM. What are the results? If you get a 100% match can you create a new file in the format as the existing file like this? 
 
 copy your existing source file 
 delete everything in it apart from this one sentence 
 copy the text from your Text file (to ensure it's not inheriting any underlying problems from the existing doument) and paste it into your copy of the existing file so tha now you have the same sentence twice and nothing else in the file. 
 
 Test that... and what happens?

Paul · Answer

E-Global E-Global 
 E-Global E-Global said: I guess the problem is caused by Adobe InDesign. 
 I wouldn't say it's caused by InDesign, it just sounds as though there is something different in the text in your InDesign file that isn't in your TM. What happens if you confirm the InDesign segment to your TM now? Do you also see a 100% in future?

Trados Studio > 1. Trados Studio

The Source texts between in the sdlxliff and translation memory's TU is perfectly same, but the matching score appears 99%, not 100%