Clear Web Data option in Settings > 1Password Browser does not clear all web data

Hello, I've been using 1Password for a few years, and every now and again when using the in-app browser I've noticed that even though I may have recently used the Clear Web Data option in Settings, occasionally websites still seem to remember bits of info from previous visits. However, I didn't have good reproducible examples that showed the issue.

Now, however, I have found some:

A) Transport for London (TfL)

1. Go to the TfL website ( https://tfl.gov.uk/ ) and use the journey planner on the homepage to plan a journey.
2. When the results have loaded, reload the homepage and tap on Recents and confirm that the journey that you just planned is listed there.
3. Close the tab, then open Settings > 1Password Browser, tap Clear Web Data and then Remove Website Data.
4. When the 'Website data removed' confirmation message is shown, force-quit 1Password.
5. Launch 1Password, repeat steps 1 and 2 and see that despite selecting Clear Web Data your previously planned journey is still listed under Recents.

B) Websites using Zendesk help desk software with the Recently viewed articles option active/visible

1. Visit the following websites:
   https://support.basekit.com/hc/en-us
   https://help.kik.com/hc/en-us
   https://support.scorm.com/hc/en-us
2. Browse around various articles, and notice that articles you have previously viewed are listed either at the bottom or right-hand side of the page under 'Recently viewed articles'. (On iPhone, URLs for the BaseKit and Scorm sites need to be edited and reloaded with the 'mobile_site' parameter changed to 'false' for this to work.)
3. Close any open tabs, then open Settings > 1Password Browser, tap Clear Web Data and then Remove Website Data.
4. When the 'Website data removed' confirmation message is shown, force-quit 1Password.
5. Launch 1Password, repeat steps 1 and 2 and see that despite selecting Clear Web Data your previously viewed articles are still listed under 'Recently viewed articles'.

This happens for me on an iPad Air 2 and an iPhone SE, both running the latest release versions of iOS and 1Password.

1Password Version: 7.3.3
Extension Version: Not Provided
OS Version: iOS 12.3.1
Sync Type: Dropbox