Sorting/searching doesn't work on one of my lists

[Ratatosk]

Hi, sorting/searching is not working on one of my lists. I am 99,9 % sure I’ve done everything right.

After 30-40 rows it suddenly starts sorting. Search does not work at all.

[Ratatosk · Accepted solution]

Fixed it by changing to this:

[drhomey]

What did you change here to make this happen?