Unless there's a problem with the Android app that wasn't evident until the Roku device firmware update. Which would mean the problem occurred after the firmware update, and the hidden bug with the app became evident.
Roku would still need to fix it, but could be looking in the wrong place.
Basil
https://www.basilsblog.com/
Roku Ultra (4660)
Apple TV (5th gen), TiVo
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Roku boxes from every generation.
Apple TV (2nd, 3rd, 4th gen)