This issue has been introduced in an update(8.0.552.215) released by Google Chrome developer team. To fix this issue follow the following steps:
1. Open Google Chrome.
2. Type about:plugins in the address bar and enter.
3. Find Chrome PDF Viewer in the list of plug-ins.
4. Click on disable link to disable this plug-in.
5. Close Chrome and reopen it.
6. Log in to irsLogics.
7. Make sure the zoom is 100%.