Problem with auto embed

This code

<a href="https://academy.authenticgermanlearning.com/prep2/">my link</a>

looks as it should:

my link

But when just posting the link

https://academy.authenticgermanlearning.com/prep2/

there is a problem. Links are posted this way when people want to send each other links via messages on the site.

This is how it looks:

Lerne deutsche Präpositionen! | 2 minutes to save 40 hours

1 YOU CANNOT READ THIS TEXT BECAUSE IT IS BEING ECLIPSED BY THE AUTO EMBED ABOVE

2

3

4

5

6

7

8

9

10th line after the link, line 1 through 6 are not visible. In the messenger, the link actually eclipses a good portion of the field to answer the message with the link.