I cannot reproduce the problem with the test case.
I also looked closely at the application and there are only some places where the problem occurs. Unfotunately, I cannot find a pattern that explains the cause of the problem.
The best I can do now is to create a support ticket and give you the complete source code of the application, so you will perhaps find an answer to this problem.
Attached are 2 screenshots with and withour the search, so you can see what I mean.