Multi-column bookmark menu sometimes truncated

[whileloop]

This problem depends on the bookmark menu column width, the position relative to right/left edge of screen, or maybe screen size relative to column width.
I feel that this problem occurs more easily on bookmark menu of bookmark button than bookmark toolbar.

I'm using Cent 3.9.2.45. Not sure whether previous version has this problem or not.
I attached a bookmark file for testing.

[Admini]

Thanks for your feedback.
However we can't reproduce this issue.
We need more information:
1. What is your screen resolution
2. What is "Column width" in chrome://settings/cbBookmarks

[whileloop]

Thanks for your feedback.
However we can't reproduce this issue.
We need more information:
1. What is your screen resolution
2. What is "Column width" in chrome://settings/cbBookmarks

Screen resolution is 1280x1024 and column width is 300px.
After testing I get the following conclusion, 
Cent 3.5.3.50 (chromium 67) does not have this issue.
Cent 3.6.8.96 (chromium 69) starts to have this  issue.
Before v3.5.7.50, the whole screen width can be used to display the submenu and the parent folder can be overlapped.
After v3.6.8.96, submenu cannot overlap parent folder. If both left and right side of parent folder do not have enough space to display submenu, then it is truncated.

Knowing how this issue occurs, I can avoid this issue by decreasing the column width and keeping the number of bookmarks in a folder fewer than two columns. Now this is not a big problem. Thank you for you attention.

[Admini]

Screen resolution is 1280x1024 and column width is 300px.
After testing I get the following conclusion, 
Cent 3.5.3.50 (chromium 67) does not have this issue.
Cent 3.6.8.96 (chromium 69) starts to have this  issue.
Before v3.5.7.50, the whole screen width can be used to display the submenu and the parent folder can be overlapped.
After v3.6.8.96, submenu cannot overlap parent folder. If both left and right side of parent folder do not have enough space to display submenu, then it is truncated.

Knowing how this issue occurs, I can avoid this issue by decreasing the column width and keeping the number of bookmarks in a folder fewer than two columns. Now this is not a big problem. Thank you for you attention.

This should be intended change.
We need to show parent menu when sub-menu is shown, so we have to prevent sub-menu from covering entire screen.