Already existing upgrade icon's not visible on unit but still work

[HankHell69]

Greetings fellow Hive members. Has anyone ran into the issue after importing a bunch of assets that it could kind mess things around a little for assets that already exist within WC3? The issue I'm having is not major. For example after importing assets I noticed certain standard DISBTN upgrade icons are not visible ON grunt and headhunter such as "Brute Strength" or "Troll Regeneration" but they are visible in the Barrack's (Pillage icon still visible on unit); however once you upgrade that unit they seem to still work yet the icon's are not visible on the character as upgraded. Not a huge issue doesn't affect gameplay but it is kind of bothersome not seeing your units upgrades whether upgraded or not. Could it have anything to do with editing the Grunt and Headhunter in the original tech tree instead of creating "new custom unit" then applying edits?