Roku App - Keyboard cut/paste issue

I'm hoping the Roku app devs will catch this and address it, as it's been happening for as long as I can remember in previous versions, up to and including the one just released in December of 2024. For background, I'm using the official Roku app on Android on a Samsung Galaxy Note 20 Ultra 5G, but this issue happens on other devices as well, and is not specific to any particular Roku device, network, or mobile device.

Problem scenario: I have some pretty cryptic passwords for various apps like Sling (a necessity these days), and I manage all these with a password manager (also a necessity these days). When I need to log in to an app like Sling, it's very difficult to peck all that gibberish in on the on-screen keyboard. A good solution to that is to use my Roku app on my phone, open my password manager, copy the cryptic password to the clipboard, go to the Roku app's remote control, open the keyboard, and then paste.... However, when I do that, the keystrokes, while appearing correctly on my mobile device on the Roku app's keyboard emulator, appear garbled and out of order on the TV screen. It's like there is some kind of timing issue, as if the keystrokes are being transmitted too fast from the app for the Roku on the network to receive them, hence they're garbled. If I peck them in manually, it works fine, but pasting any string of characters of any significant length always yields this issue.

It's extremely difficult to use some apps now that I have created higher security logins, because the app seems (unfortunately) almost useless for entering them. Again, I'll point out that this happens on different physical networks (i.e., at different houses), with different Roku devices (from an old Streaming Stick to a brand-new Roku Ultra+), so I really don't think this has anything to do with my specific setup.

Any advice or workarounds would be GREATLY appreciated!