Filter document libery goes back to main folder

Hi all readers,

i have a problem with the filter on Sharepoint online.

if you go in to a sub folder and pres on the filter and than see all it goes back to the main folder

this started around last week

i coudent find a solosion did anybody has the same problem?

Edit: i have added a vidio to show what goes wrong

kind regards,
Sil van Noordennen