Labels flickering on maps in ArcGIS Enterprise 11.4

[Joshua-Young]

When a map loads in the Map Viewer or Experience Builder several labels will flicker on the map. Sometimes they will stop flickering after a few seconds of the map not moving and other times they just keep flickering. Layers with the flickering labels are feature services from a SQL Server hosted enterprise geodatabase Graphics drivers are up-to-date, and we are on ArcGIS Enterprise 11.4. This is a very distracting issue.

Anyone else experiencing this and know of a fix?

[TimWestern]

It's almost like its stuck in a render, re-render cycle, notice how it disappears and then seems to draw the 4 than a 9 that's 0 and 1 ? (401)?

I'm curious if you hit F12, and look at the console while this is happening are there any messages you find?

[CUBoulder_GIS_Office]

Hi @TimWestern - I'm having the same issue (flickering text in the MapViewer, Enterprise 11.4) and when I checked the Consol I'm getting this error: 
Failed to load /portal/apps/fonts/t...regular/0-255.pbf:1 resource: the server responded with a status of 404 ()
This indicated that maybe the font isn't on the portal machine? 

[TimWestern]

Based on that in the console it either is not in the machine, has not been installed via npm somewhere, or if its looking to load it from a remote site the url may be wrong.

You may try looking in the Dev Tools of the Browser (F12) then go to the network tab and see if you can find that file's 404 message and look at the request parameters to figure out which it is.

[CUBoulder_GIS_Office]

I tried changing the labels to a Windows 11 default font (Arial) and the issue continued. I'm wondering if it's not an issue in the font path?
Please note - this is oly happening on labels created AFTER the update - labels that were present in our 11.1 maps are fine. 

[TimWestern]

This screen cap has me wondering if something is getting stuck in a never ending refresh/render cycle.  

[TheRrrr42]

@CUBoulder_GIS_Office May I ask what type of graphics driver/card/chipset you are experiencing this on? I am also experiencing this flicker on my machine but only in one label dense web map.

[Joshua-Young]

One a desktop computer with Intel and NVIDIA graphics does not have the issue. Another laptop with Intel and NVIDIA graphics does have the issue. Both computers are up to date on drivers, we are using the same web browser, and looking at the same web map.

[TheRrrr42]

Do you know if the Intel drivers are Intel Arc or Iris Xe drivers? 

[Joshua-Young]

The laptop that is having the issue is Intel Arc. The desktop without the issue is Intel UHD 770.