Normally, the search tool takes the input query, applies it to the search type selected (Community/Comment/Post/User), and outputs the corresponding results. The user then has the option of switching to another one of the three tabs to repeat the search with a different search type. This functioning normally is demonstrated in the first GIF below:
If the user switches to a different tab before the search completes, however, the search is unable to be applied to the newest tab. Tapping on the search box and pressing enter also doesn't enable the query to be processed in this case, without at least removing or adding a character to it first.
The first example is quickly switching tabs before the initial search is able to load:
The second example is switching tabs after having completed the initial search and quickly returning to the original one:
The third example is switching tabs after having completed the initial search and quickly switching again to a different one:
