Horizontal scrollbar on browse forms is blank

After a Windows update, the horizontal scrollbar at the bottom of all browse windows (e.g. Browse Repair Orders, Browse Customers, etc.) is blank. How can I fix this problem?

This problem apparently occurs after installing the April 13, 2021 Windows 10 1909 update 18363.1500 (KB5001337) from Microsoft.

This problem is apparently resolved after installing the April 13, 2021 Windows 10 2004 update 19041.928 or Windows 10 20H2 update 19042.928 (KB5001330) from Microsoft.