I found that too with Chrome. Switched to FF and resolved.
I looked at it once and it seems to poll the web server. I think the web server is single threaded and the AJAX like approach causes problems.
I don’t know why evbug is loaded on your device, but it shows a lot of disconnects.
Jan 10 22:03:18 vero-osmc kernel: evbug: Disconnected device: input52
Jan 10 22:03:18 vero-osmc kernel: evbug: Disconnected device: input53
Seems like the dongle isn’t getting enough power, which would be surprising for the Vero as the power requirements are minimal.
Can you try it in another device like a PC for a couple of minutes? Not all buttons will work out of the box for that iteration of remote, but the directional keys will.