IOS 13.3 cannot connect to app store

Since IOS 13 on my iPad Pro 9.7" I am having trouble with the reliability of Dropbox and the App Store. Symptoms include:

• tapping to load Dropbox results in a white screen for ever until I press the home button or kill dropbox
• tapping the iTunes & App Stsore option in Settings hangs, after about 1-2 minutes the Settings app closes
• tapping the app store icon to load it and re-install dropbox, it says "cannot connect to app store"

Restarting the iPad does not resolve the problem.

Resetting the iPad does resolve the problem for a few days. After a few days all symptoms return.

Any suggestions?

Regards,

Roger.