If you add an option for a module in a chain and use an incorrect value for the key (or simply add a space at the end), then save the changes, none of the options will be displayed and they can not be corrected.
Steps to reproduce
In OpenAM 13.5.0 console > Authentication > Chains > ldapService
For the DataStore module click on Edit (the pencil, right top corner).
Add the following option (with extra space at the end): "iplanet-am-auth-store-shared-state-enabled " with value "true"
Click on + to add the parameter, click on OK , click on Save changes.
Leave the page and come back to it.
In the DataStore box, the number of options shown is a big number (I have seen 90, 91, 94, 100, ... depending on the error introduced).
When editing the module, none of the options (even if there are correct ones) are being displayed... so they can not be corrected.