Random unselect able dimension appear

[tcaratella]

Hi All,
We are using ArchiCAD 24. We have a large project with hotlinks in a main model using Teamwork. Occasionally what happens is that there are random dimensions that appear. They are all over the place and cannot be selected. They are not any particular layer. See image below. The only way around this so leave and re-join the project - however this is happening more frequently now and its taking up a lot of time leaving and re-joining the project. This looks like a bug! anyone have any ideas?