The creation and customization of database applications using Microsoft Access
What we need from you, beyond the report that a problem exists, is some specific details about the context in which the problem occurs and when and how to make it appear. Which control types are you copying and trying to paste? Textboxes, labels, others? Is there any code running in VBA when this problem occurs? Please verify: this problem appears in design view, correct?
The best possible evidence to enable an investigation is a small accdb that reliably illustrates the problem. Can you share one?
Actually, I just successfully completed a copy/paste operation of several controls on one form in one of my existing databases. I also was able copy those same controls onto another form. In other words, this problem is not replicable in all cases. That means a precise description of exactly what you are attempting to do and the steps involved is required to do any investigation.
In addition to that, we need the exact version and build of Access you have installed.
Go to the immediate window in the VBE and run this command:
?syscmd(acSysCmdGetFullVersion)
Report what it returns.
Here is my version, for example.
Microsoft Access (Version 2607) Build 16.0.20228.20190 Current Channel 32-bit
Another consideration that may be involved would be whether you have exclusive use of the accdb when this happens.