Iron doors when placed open are seemingly impassable to villagers. I believe they register as closed to them. They should be able to travel through these iron doors without any problems.
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The villagers will not pass through iron doors which read in the debug (f3) menu as closed. They will pass through iron doors which read as open, however. This is not a problem with Optifine, as it occurs when not using the addon.
This report is invalid as your game was modified when experiencing this issue. In the attachments you've provided, I can see that you're using modifications and the bug tracker only handles reports that can be reproduced in a vanilla environment. If the problem persists without the use of mods, feel free to create a new report. Additionally, please see the Bug Tracker Guidelines for the minimum standards when submitting a ticket.
will test