First and most important of all none of your items are specific to Architecture. These can occur with any discipline. Next let’s go over the obvious solutions to your problems:
1. When publishing (batch plot) layouts to pdf, some layouts (randomly) don’t plot
Answer: Could be a number of issues including the plot device used but first disable background plotting
2. There is not a text field (attribute) to automatically number layouts according to tab position
Answer: This is easily solved by running a simple lisp routine
3. Xref images and pdfs keep unreferencing
Answer: This sounds like a problem caused within your own computer filing system or system setup especially if it’s on a network
4. Dialog boxes sometimes stop displaying, besides command FILEDIA, CMDDIA, etc. is set to “1”. (Why theres even an option to not show something so essential as a dialog box, and why it turns off randomly?)
Answer: Could occur if you had more than one monitor and then changed to a single monitor and now the dialogue appears offscreen.
5. The dialog box when searching (for example) for a referenced pdf, looks like windows of 1985 instead of displaying the current windows 11 file explorer version; making it tedius to search for something because even the quick access files are not displayed.
Answer: Don’t use AutoCAD to search for files
6. Hatches sometimes don't recognize closed boundaries if the boundary is not dsplayed (zoomed to all extent) in the model space, despite it is closed
Answer: Don’t use pick point option but instead select the boundary for the hatch
7. When publishing (batch plot) the cursor disappears for almost a minute on the AutoCAD window while the program loads.
Answer: This does not deserve an answer. You can even say why does it take so long for the AutoCAD program to load at startup? Why are you still even using this? Just use something else and your problems are solved instead of wasting time complaining about it here on this forum.