iPad Problems since installing iOS 14.8?

No one here works for Apple.

We are all, largely, just Apple product users here, just like you!

Apple would like its iOS device users to NOT constantly quit apps, but to do that, you need toggle OFF Background App Refresh under Settings, General, to make sure no apps are getting any background app data from the Internet.

Even with doing that, apps CAN still use up some RAM and CPU cycles, regardless.

If you have a 2015 iPad Mini 4, that iPad model ONLY has 2 GBs of internal processing RAM.

Most iPad models these days have a minimum of 3 GBs of internal processing RAM and many have 4 GBs of internal RAM and up!

I find if you have a lot of apps hanging in the iOS background app switcher ( like 20 or even more ) it is much better to quit/clear out any apps that you do not access every single day and maybe pair the list down to around 20 apps or less.

If you have like 50+ apps hanging in the app switcher, it is just going to bog down response of an iPad over time.

For older iPad models with a Home button, do a simple hard reset of your iPad by holding down both the Home and sleep/wake/power button simultaneously until your iPad goes to black and restarts with Apple logo, then release the buttons.

Best of Luck to You!

What is the rated, internal data storage space/capacity of your iPad model and how much of this free, internal data storage capacity is left inside of your iPad model?

All of that additional info can be found in the Settings app, General settings panel, About.

I suspect that you own a low storage 16 or 32 GBs iPad model.

Thank You.

Okay it is NOT internal free space.

Do you leave a lof of still active Website tabs active inside of a Web browser?

Do you leave lots of, potentially, background running apps hanging in the iOS/iPadOS background app switcher?

Maybe its an issue with the GMail and Weather.com apps.

Has there been a recent app update for these apps?

Same for the Duolingo app?