https://bugs.winehq.org/show_bug.cgi?id=55582
--- Comment #4 from Béla Gyebrószki gyebro69@gmail.com --- I came across an unofficial patch for Civ 2 which is intended to fix the same problem that also occurs on modern Windowses:
https://www.pcgamingwiki.com/wiki/Sid_Meier%27s_Civilization_II#Unofficial_p...
Direct link to the patch: https://github.com/FoxAhead/Civilization-II-64-bit-Editbox-Patcher/releases
The patch works for me with the Multiplayer Edition of Civ 2 (not sure it is usable with the vanilla version of Civ 2).
Seemingly, the problem reported here also occurs on Windows (game crashes when entering text in input boxes) so strictly speaking this might not be a Wine bug (but it would be nice if it could be fixed in Wine).
wine-8.20-47-g137638e185e