For such a reason, drive icon have a priority in tab title over user-defined icon. This is wrong because user wish is first.
What is the reason of the user defined icon that changes, when you browse to the root of the drive? In ideal there should be an opportunity to change that priority, but simply the custom icon should have higher priority than any auto-icon.
Folder tab icon display priority
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- ghisler(Author)
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Currently the order by which icons are applied is the order shown in Configuration - Options - Folder tabs - >>. I don't currently see how the user could influence this order. 

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2paravion
Simply just remove the chekmark in "For local drives" in the Configuration -> Options -> Folder tabs -> [>>] (button) dialog....when you browse to the root of the drive...
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Danish Total Commander Translator
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Danish Total Commander Translator
TC 11.51 32+64bit on Win XP 32bit & Win 7, 8.1 & 10 (22H2) 64bit, 'Everything' 1.5.0.1391a
TC 3.60b4 on Android 6, 13, 14
TC Extended Menus | TC Languagebar | TC Dark Help | PHSM-Calendar