yes that is the issue ,hopefully fixed with next update but at the same time check these settings u did or not and if not then as of now u can do these and observe is there any improvement the setting are;
5. Long press on each app specially 3rd party and rarely used app>app info>
A. Mobile data> allow background data usage>off
B. Battery >allow background activity >off
C. Notification >disable unnecessary notifications like promotional and unnecessary reminder notifications.
6. Device care>battery >select "optimised and adaptive power saving.
Steps to enable developer option settings >about phone>software information >then u find build number >tap 7 times>then back to settings and at end of settings one new option called developer option click on it and find that option