I posted an update to the v1.21.04 hotfix in the top post above.
Based on my PBEM playtesting, primarily using Great Britain as host and Prussia as client and the rest as AI, I was seeing a problem with Great Britain locking up in view mode and not normal mode during its Feb 1805 dip phase, preventing it from doing anything. I was also noting Prussia DOWs on adjacent minors during its dip phase were not being implemented, nor could the PBEM Admin menu fix that.
For now, the update appears to fix the view mode problem and in some cases the Admin could perform the DOWs but in some cases not. I will continue to investigate, but for now these fixes should help the PBEM game in progress to proceed. I was also still seeing some loan money transfers working, like from Great Britain to Prussia, but not others like from Austria to Prussia when I test Austria as PBEM host.
Like I said, I will continue to investigate. I could not recreate the missing depots issue. I'll see what I can get done in March and proceed toward an official release with or without PBEM working better.
Empires in Arms Development Team