I reported this but from my iMac on the Synapse site, but just in case I'm reporting it here. (There seems to be no way to use Synapse from iOS.)
I have a login entry in my 1Password app which works successfully on my iMac. However, when I use the same (iCloud-synched) login item on my iPad, no data are entered in the name or password fields on the https://onlinebanking.tdbank.com site. I can reproduce this easily. I tried to create a new login item manually in the Safari extension, and I tried to create a new login item from scratch in the 1Password app. Neither of these attempts changed the 1Password behavior. My only work-around so far is to type in my account name manually and to copy the (far from memorable) password from 1Password's Safari extension on iOS and paste it into the TD Bank password field. Needless to say, this isn't very convenient.