Arrow not display in exemples

We have potentially this issue though I have not examined it yet. Customers are saying that if the fonts we use are untrusted. The Windows 10 OS appears to now be blocking untrusted fonts. Here is what our customers are saying:

"UI resources such as down arrows on icons, etc. do not display properly when the Windows 10 security setting to block untrusted fonts is enabled. The resources either do not display at all or display as alphanumeric e.g. the Solid Edge icons have a character "3" displayed instead of the expected down arrow."

Microsoft has determined untrusted fonts to be a low risk and that users can enable the use of untrusted fonts as the default. But, some customers are balking at disabling that setting.

See https://techcommunity.microsoft.com/t5/microsoft-security-baselines/dropping-the-quot-untrusted-font-blocking-quot-setting/ba-p/701068

Perhaps you have that setting enabled to block untrusted fonts.