There is a bug that when I use Renshuu with my Samsung Tab S10 FE, if I use the S-pen to navigate and press around, then when I try to press a word to get it's meaning the small popup window appears for around 250 milliseconds and then dissapears again. After this has happened it doesn't matter if I try to press with my finger or the pen, both times the popup window auto dissapears. The current only fix is to restart the app. Sometimes when i do my quizes some random popup windows also get stuck in the open position even if I have not pressed them. This is usually on the answer page. My suspicion is that the pen tracking somehow gets stuck between page loads/refreshes, and the page thinks that it's clicking/hovering over a position other than where it's in reality. This has only been tested on the Android App, and not in the browser.
This is a known bug, but unfortunately not one that I can fix. the S-pen appears (I do not have one myself, and as I am a solo developer, I do not have the resources to buy a device + pen just to dig into this bug) to have multiple settings for its use. I seem to recall that one of them has to do with hovering, trying to mimic the mouse-over effect of a mouse on a desktop device. For others, disabling that seemed to fix it.
Ultimately, though, while I'd love to fix it, not having the device makes it just short of impossible :(
