Creating new folder in browser never works first time

Nextcloud Box with Raspberry Pi 2 (Q1 2015) running Nextcloud 11.0.3
Ubuntu 16.04.2 LTS
Installed from supplied 4Gb micro SD card.
Connected Box to internet. (Have HTTPS access using and a Letsencrypt certificate.)

After using my browser to log in and navigate e.g. to my Documents folder, I:

click on the +

choose New folder

Type in the folder name

Press the Enter key.

I’m expecting the new folder to appear but it doesn’t - not even if I navigate up to Home and back again or if I reload the current page in my browser (Firefox 53.0.2 (32-bit) on Windows 10 (32-bit)).

If I repeat the procedure, it does appear. Probably only have to repeat it once, though not sure.

Wonder whether this issue is reproducible by others.

Not a big deal but not good to have to do things twice.

There are demo setups where you can check how it is supposed to work (if it’s something specific to your setup or perhaps a general bug):

In case, it doesn’t work on your system, please check the logfiles.

Thanks for the links to the demos.

Tried 11 on the demo site and could not reproduce the failure to create folders first time. Went back to my own server and again unable to reproduce the problem.

Mystified but glad the problem, observed several times during the same period of being logged in, not sure now whether also in any distinct period of being logged in, seems to have gone away.