Multiple reports of issues with iPadOS 17.7.7 have been seen within this Support Community.
You and anyone else that encounter issues subsequent to updating to iPadOS 17.7.7 should submit a Bug Report via Apple's Product Feedback portal. For iPad and iPadOS:
Feedback - iPad - Apple
When submitting your Bug Report, please ensure that you include details of your iPad model and installed version of iPadOS within the body-text of your report along with details of the problem. Do not rely upon the pick-list - as this rarely includes the current version of iPadOS. To submit your report, choose the nearest available version from the list - ensuring that you include iPadOS 17.7.7 in the body of your report.
Every Bug Report counts. Unless reports are submitted (with adequate detail), Apple may not assign resources to investigate and correct the issue.
In addition [i.e., not as a substitute] to submitting a Bug Report, you might also consider seeking assistance directly from Apple Support. You can contact the Support Team using the Support link at top-right or bottom-left of this page; you can initiate and manage your support cases from Apple devices using the excellent Apple Support App. If not already installed, the App can be downloaded from the App Store:
https://apps.apple.com/app/apple-support/id1130498044
