When reacting to a post using an emoji on iOS 18.3 I am able to scroll through the full list, however when using the optional search facility the UI seems to 'glitch' and it requires repeated presses to get the keyboard to open as expected.

Approx 25% of the time the emoji modal is not correctly placed on the screen. It seems to be affected by where the post is located on the screen when it's first clicked - ie. upper/lower half of screen.