Have you tried resetting the tools? If you select a tool, in the Optoins Bar select the tool option and click on the dropdown menu icon. Click on the Gear icon and from the menu, choose reset tool, or reset tools and see if that might help.
This is more informational:https://helpx.adobe.com/download-install/kb/macos-sequoia-compatibility-common-issues.html
From what you are saying and other posts I am seeing in the community, it seems that Photoshop and Sequoia are not playing well together yet.
I am hoping someone else will chime in here, because I am not on Sequoia and do not have an other options for you.
Let me know if resetting the tools helps or not--
Michelle
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