The links were bad (no underlines) but at least different fonts (earlier feedback):
https://www.yamahasynth.com/ask-a-question/a-few-usability-issues-link-css-and-date-timestamps

Since then things have gotten worse (latest feedback):
https://www.yamahasynth.com/ask-a-question/font-changed-links-still-are-obscured-in-forum

In order for your own messages to use links - the (in my opinion bad policy) burden is on you to underline the links you add into messages yourself. Users rightly expect that the forum will handle this for them - so it isn't done. Plus there's "tons" of older messages where, at least, the links were slightly distinguished from regular non-link text. So those older messages do not add manual workarounds. A long time ago links were underlined by default. Then just bolded in a different font. And now - the same font and style entirely.

Expect missing the buried links or extra back-and-forth and extra support noise. All you can do now is manually add underlines for your own links - hope others do too - and wait for the web team to undo this poor formatting choice.

To add the underline - either type "[" then "u then ]" all squished together, then the text, then "[" then "/" then "u then ]" to stop underline. Or you can highlight (select) the text you want underlined and press the button at the top of the text editor here that's a "U" with an underline.