Hi,

I need to know more about your issue:

(1) Do you use the teridaci host card(work station card) in your environment? You said the issue will disappear if the session is launched with teradici client.

If yes, It's mostly a compatible problem between vmware horizon version and teradici host card version. You need to review teradici release note to check if the horizon version is the one they recommended to use with their Teradici host card version and host card firmware version.

(2) Please provide your OS version, and  horizon client/horizon agent version;

(3) Did you mean the issue happen only after upgrading the horizon client version from 7.8 to 7.13, and has no changes to other software versions?(such as VMware horizon agent version, Teradici host card version).

(4) If there is no compatible problem for (1), I think it's necessary to gather horizon client, horizon agent and teradici host card logs together for further analysis. You can upload the log and submit an SR to us. The experienced service members from VMware can help you in a more efficient way.

Best Regards.