I have been having a problem for a few months on Samsung S8+ (Android 8.0) where I type in a few letters of a site name to filter the result list from my vault. When I tap on the desired item, nothing happens i.e I don't visit geekfell get a menu of operations popping up.
If the list is not filtered and I scroll down to the item, then there is no problem.
The problem doesn't happen all the time, but certainly 4 times in 5.
Could you try uninstalling the LastPass app, restarting your device, and reinstalling the app to see if it resolves the issue with the selected site not properly being filled from a filtered list?
I had this problem around the time of this thread being raised, and still have it now.
One variation in my experience is that my workaround is to cancel the search and enter it again, after which it will then work. I still do get the problem with 3/4 initial attempts though.
I currently use a Samsung Galaxy S10 (up to Android 12), but am pretty sure I saw it back then on a Galaxy S9.
Others still seeing this?