Guided Access lagging and cannot exit with double-click on iPhone with iOS 26

Re: guided access , accessibility feature :Anyone facing issue while using guided access in ios 26,

it become too slow .... "

Seems it can take awhile for this major update to complete the re-indexing and etc. process after installation.

If we can ensure enough memory / storage space / power is available for some time after installation, we should soon be able to use our devices normally, else it may take longer.

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Re: " ... and double click to end is not working".

Apple support's online article for iOS 26: Lock iPhone to one app with Guided Access - Apple Support

Eg: says:

"End a Guided Access session

Depending on the passcode options you chose when you set up Guided Access, do any of the following:

• Use the passcode: Triple-click the side button (on an iPhone with Face ID) or Home button (on other iPhone models), then enter the Guided Access passcode. If you didn’t set a Guided Access passcode, enter your iPhone passcode.
• Use Face ID or Touch ID: If you turned on the Face ID or Touch ID option in Guided Access Passcode Settings, double-click the side button or Home button, then unlock your iPhone with Face ID or Touch ID (depending on your iPhone model)."