Unexpected behaviour with multiple instances of meld

[Peter Williams <pwil3058 gmail com>]

I use meld a lot (and have been for years) and usually have more than on 
instance in use at a time.  There are a number of reasons for this usage 
pattern (e.g. working on more than one project at a time) but the main 
one is that I use it as the external diff viewer for git, mercurial and 
darning.

This used to work well for me but lately I've experienced problems as 
follows (meld 3.12.3 on Cinnamon):

1. if I launch a new instance of meld while I have a running copy 
minimised/iconified, the minimised instance gets raised.

2. if the original instance was on a different workspace to the one I 
was working on I get shifted to that workspace (which can be a little 
disorientating).

3. if I tick the "visible on all workspaces" option in an instances 
window management options (in an attempt to cope with issue 2 above) it 
doesn't play nicely e.g. it only shows up on another workspace if it was 
maximised when I changed workspaces.  Other programs do not exhibit this 
behaviour including ones I have written myself that have nothing special 
in their implementation to achieve this.

I realize that other users probably use meld in different ways to me and 
that this coupling between instance probably suits their work practices 
but I was wondering if it would be possible to have an option that turns 
it off to allow launching of independent instances?

Thanks
Peter