Search failed

[Flinx]

At the moment, I once again have an IDE state that I am familiar with, but which rarely occurs.
I have three tabs open and occasionally switch between them (I don't know if that has an influence).
Now I searched downwards for a variable name and got several hits. Then, after the last hit, I changed the search direction and searched upwards. And suddenly nothing was found.
As a test, I inserted a line above the last hit and entered the search term there, and it was found, but not the lines above it.
Now I switched to searching from the beginning of the file and downwards, and the hits are back again.
But searching upwards from the lowest hit still only finds the inserted line above the last hit.
Finally, I clicked a few lines above, and then the reverse search worked. I tried it line by line: the search failed up to four lines above the inserted line, and worked from the fifth line onwards. And I can repeat that at the moment.
Closing and opening the IDE removes the effect.

[airsoftsoftwair]

Looks very complicated to reproduce. Can you provide a full test source code and the exact search terms so that I can reproduce it in exactly the same way? Thanks!

[Flinx]

Difficult, because I don't know exactly the things I did before. I'll try...