Hi,
Right, I'm being prompted over and over for my Apple ID when trying to update apps, for being exact; this happens when I click the 'Update All'. I have over 100 apps on my iPhone XS, so it requires me to enter my Apple ID 100 times whenever an update appears. This is really annoying.
There is no alert or message appeared after I hit 'Update All', and I couldn't say it is irresponsive as the uploading symbol(s) nearby the apps begin turning, yet as you mentioned at that point I'm being asked over and over for my Apple ID and updates do not begin to load. Whenever this happens somehow I cancel 'Update All' by hitting 'Cancel' in one of the prompted Apple ID box, then app by app I manually update.
Recently I've updated to latest IOS version 14.2, and I am still not able to update apps at once.
Sincerely,