Trade: Sort by Weighted Sum Option Sometimes Missing

Ever since the 0.2.0g patch, the option to sort by weighted sum is sometimes missing on the trade site. As a workaround you can adjust the minimum weight over and over again until the option finally shows up, but this is annoying and tedious to do.

Reproduction example: https://www.pathofexile.com/trade2/search/poe2/Dawn%20of%20the%20Hunt/9pw0LymCK

I had this happen to me yesterday. It seemed to start after making many changes to an existing search. I was trying to narrow down on spirit amulets. It is working today though.

I was able to repro on my browser by adding a not filter for strength to my amulet filter...
https://media.discordapp.net/attachments/1243307874713600187/1374135411609440286/image.png?ex=682cf2d4&is=682ba154&hm=5c64c17ca5de6a8a917cd81d7003472c4aca34587ba92db02b15a0330a204d7f&=&format=webp&quality=lossless&width=1314&height=588

This issue, as of today, is still there.
https://www.pathofexile.com/trade2/search/poe2/Dawn%20of%20the%20Hunt/83mL8vVHV

When I removed rare from the criteria, the sorted by sum will show.