Thanks for the suggestion! I will try a different browser as well. I do not have very high hopes though given that I can see the effect also on the Asus App on Android.
I recently replaced an AX-86U (which died) with an AX-86U Pro and have been experiencing daily instances where the Clients List accessible via the ASUSWRT official management UI freezes (no devices are added or removed, tx/rx, time connected are stuck and no longer update, also affects display...