I keep playing with this in Chrome and the only work-around appears to be to not touch the mouse while in the browser tab with the identify modal, and this does not always work. My sometimes functioning work around involves my need to access a text file of comments that support an identification. I press i to start the ID, type the ID, usually just the first four letters of the genus and first four of the species is sufficient, then I wait for the drop down list to appear.
I use the down arrow key to move down to the ID I want. I press Enter. The ID appears in the species text box. I press tab to move to the comments.
I use alt-tab (Chrome, Windows, command-tab on OSX) to change windows to my text editor. In my text editor I can use the mouse and control-c to copy text without losing state back in the browser window.
Then I alt-tab to return again to the browser where my cursor remains where I left it in the comment box. I use ctrl-v to keyboard paste into the comment box. I press tab again to land on the Save button. I then press enter. I then use the right arrow to move to the next identification. As long as I do not touch the mouse while in the browser window, this often (but not always) works. Just don’t touch the mouse!
Mouseless browser window tab changing shortcuts exist also (ctrl-tab and shift-ctrl-tab in Chrome), but, again, no touching the mouse while in the tab with the identify modal. I do seem, on a good day, to get away with “touching” and using the mouse on another tab in the browser, as long as I ctrl-tab, or ctrl-shift-tab back to the identify tab. Remember to “leave” the comment dialog box with the tab key, not the mouse! Don’t touch the mouse… Use the enter key when one has tabbed onto the Save button.
Perhaps this will help suggest to someone what is happening in that identify dialog box.