LovesSleep,
This article explains how testing the issue while in safe mode can help isolate the cause of the issue which can then be used to resolve the issue:
How to use safe mode on your Mac - Apple Support
"Safe mode can help you to determine whether an issue is caused by software that loads as your Mac starts up.
Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
Safe mode is particularly useful when you're trying to resolve an issue that doesn't seem to be associated with using any particular app. As always, keeping your software up to date is the first step toward resolving any software issue."
Testing the issue while in a new user account will help determine if the issue is a systemwide issue or isolated to the original user account. These are troubleshooting steps to help determine what could be causing the issue so the issue can then be resolved.
All the best.