Hmm, I’m not personally sure what’s going on. (Aside from maybe it being a bug; possibly resulting from a recent game patch.) Hopefully someone will find the thread and have advice. I assume you’ve already tried disabling all your AoE game Mods to see if that fixes.
But in the meantime, do you think this sounds like your issue? If so, read through as a couple solutions or workarounds are mentioned to try