Search Function Bug

I am in a very busy channel on RC, with many questions being asked. If I do a search to find a question concerning something I wish to read more about I find the question but when I click on reply the field goes blank. So my only means of seeing that thread is to go through the history of posts to that date and time which can take quite some time. I thought I would try to search on my phone but it does not work at all (search function).