Chrome Version: 63.0.3207.0/9918.0.0 dev-channel Candy and Daisy
OS: (e.g. Win7, OSX 10.9.5, etc...)

What steps will reproduce the problem?
(1)Sign into User -> Download 25-30 Images with 1MB size or Take Screenshots using  'Ctrl+F5(Overview Mode Button)'  
(2)Now go to Files App -> Immediately select all the files using 'Ctrl+A' -> Right click to open Context menu and select 'Zip selection' option
(3)Now Files are Zipped and 'Archive' Zip Folder is seen with size 50 MB -> Open 'Archive' Zip folder -> Now In 'Archive' Zip folder before all the Images are loaded Immediately select any last Image 
(4)Now open that Image in Gallery and observe -> Also observe "An Operation is taking longer time..." message with 'ABORT' option -> click on 'ABORT' and observe (Please refer Video)
(5)Try to Close the Mounted Zip File and observe 

Expected:
a)Zipped Files should be loaded in Gallery
b)After clicking on 'ABORT' option Gallery should be closed and Continuously  "An Operation is taking longer time..." message should not be seen
c)Should be able to close Mounted Zip File

Actual: Instead
a)Zipped Files are not loaded in Gallery i.e. Preview is not seen
b)On clicking 'ABORT' option nothing happens and Continuously  "An Operation is taking longer time..." message is seen
c)Unable to close Mounted Zip File and 'Don't remove your device just yet!' Dialog box is seen

This is Regression Issue as same is working fine in M-60

@fukino: Please confirm the issue
 

Deleted: Actual.webm 18.1 MB

Actual.webm 18.1 MB Download