Topics with reserved names are handled differently from vanilla
Dialogue topics, such as "Repair" "Persuasion" "Companion Share" etc.. does not work in OpenMW, at least not the same way vanilla does it.
For example, in vanilla , clicking the topic "repair" will open the repair window.
To test, use this pluginCOMPANION_SHARE.ESP
In console, type in: Addtopic persuasion Addtopic repair Addtopic "Companion Share"
Talk to any npc, and click the topic. Test in vanilla and OpenMW.
Encountered this issue when using this mod->https://www.nexusmods.com/morrowind/mods/23197
Edited by Alexei Kotov