• Stackable shields powerups (i.e Fire Flower) are not supported;
• Depending on the dimensions, certain TVBOXES icons from other addons that include shields might not display correctly, there's nothing I can do about it as far as I'm aware;
• Shield monitors from addons that implement their own logic (don't call A_GiveShield when broken) won't store your current shield,  there's nothing I can do about it as far as I'm aware;
• For some reason, sometimes when you store your shield incredibly quickly after you get it, the icon won't be displayed properly;