Was getting this the other day, it also affected the Filters (if you were using them and you scrolled down the first tab - it would then make a change to them but only if you scrolled down to them).
I found there was a portal Solution file update available, and when I applied it resolved it Options and Filters issue (but it also rolled in all the other types of Portal not just the one I had installed, and gave an error on Field Service and Project Automation [which were not being used] - not a big issue just annoying).
Hi, yesterday I saw similar thread in powerusers forum, that sounds like a bug to me, I think you should raise a ticket with Microsoft
powerusers.microsoft.com/.../651390
------------
If you like this post, give a Thumbs up. Where it solved your request, Mark it as a Solution to enable other users find it.
We highly recommend users to migrate to PowerUsers community for new Portal questions:
Stay up to date on forum activity by subscribing.