I want to start off this post by saying I am NOT seeking a diagnosis or anything like that. I have noticed an odd thing that very occasionally happens while reading, and would like to know if it is something that people who are legitimately diagnosed also experience, and therefore if this is something I should get checked for or not.

Put simply, whenever I come across a word that is written down that I do not know, I am very frequently unable to even attempt to pronounce the word. An example is the word Liase: when I was 16 I had a standard reading comprehension test were the word Liase came up. I knew what the word liase meant and could use it in a sentence perfectly, but I had never actually seen it written down. I looked at the word for at least a solid minute and legitimately had 0 idea how to pronounce it, or even attempt to pronounce it. It should be noted that otherwise on that test I scored perfect marks, and even the examinor found it odd that I managed to get everything else correct, including several words that were considered harder than liase.

Before that point I had obviously encountered words that used similar clusters of letters (ia, se, etc.) but in this specific instance I couldn't even think of how to string together those sounds to fumble my way through the word, and it felt like my brain just wasn't processing any information relating to the word/sounds.

This was one of the first big examples of this happening that I can remember (5 years ago now) and it sits with me because I have generally been an excellent reader (plus English is my native language), yet my brain shut down so blatantly on a word that I already knew, hence why it sticks out so much. This has occasionally happened since then, although has become less and less common as time has passed as I have learned how to pronounce the words that cause this issue.

Why I ask now is because about an hour ago I was talking to some Dutch friends (in English) and they asked me to pronounce a word in Dutch that they had typed out. The same phenomenon happened this time but to a far more intense degree. I read and reread the work at least 50 times, even while they were saying the word in Dutch in various slightly different pronunciations, yet my brain refused comprehend any information about the word or how it sounded. They weren't being mean or rude or anything, yet I still started to sweat and could feel myself trying to deliberately distract myself out of stress at the situation.

Has anybody else experienced this before?
(apologies for this kind of post and if it seems like it is against the rules somehow. This is something I am curious about, yet it is far too specific to lookup, and figured that you guys could provide some insight into the situation)