Hello again! I have encountered a different thing, which is not an issue with your plugin as is, but a compatability issue with a different plugin. As it is a different issue, I can create a separate topic for it if necessary.
In my project I use a set of plugins called SRPG Gear MZ - Tactical Battle system for RPG Maker MZ (it can be found on Steam or github for free, I can send a link if necessary).
In the game, after a SRPG tactical battle starts, it becomes impossible to load the game, even after I finish the tactical battle or quit to title (i.e. loading the game is completely impossible unless I fully close the game and open it again, than I can freely load again). It only happens when WD_Quest plugin is activated.
To narrow it down, the issue only happens when SRPG_AoE_MZ plugin is activated, other SRPG plugins seem to work fine with WD_Quest (although there are two other SRPG plugins depending on SRPG_AOE_MZ, which I had to also disable during the test, so they may also cause this issue - SRPG_AuraSkill_MZ and SRPG_TerrainEffectsPlus_MZ). Screenshot below shows which SRPG plugins had to be disabled to "resolve" the problem, so the compatability issue is probably between them and the WD_Quest:
Could you please also look into this issue, if possible? Your Journal system is the most convinient one I've seen, so I would really love to keep using it, however for this project tactical battles are very important and leaving them out is not an option either