Issue with custom mouse cursor

The change began immediately after installing Windows Insider Beta build 26220.9223, so first separate a damaged cursor scheme from a build regression. Open Settings > Bluetooth & devices > Mouse > Additional mouse settings, select the Pointers tab, choose Windows Default (system scheme), and select Apply. Then check Settings > Accessibility > Mouse pointer and touch, select the standard white pointer, and return its size to default. Restart after both changes. If only the main pointer remains wrong, test a new local user account; a normal cursor there indicates corruption limited to your profile or custom cursor files. If it occurs in the new account too, do not replace system cursor files manually. Search Feedback Hub for the same build and upvote a matching report, or submit a problem with a recording and build number. Insider builds can contain regressions, so the lasting workaround is a newer build or returning to a stable release