After the element ui navigation parent div adds a location, the click submenu flashes?

this is what I changed on the element component. Add the parent of the position: fixed; location to the navigation, and then click the take menu to jump, the submenu will flash.
step: click on my workbench--> option 4--> and then click any of it to see
link description

.
Jul.08,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e53ea1-45285.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e53ea1-45285.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?