about app.beginUndoGroup() function

I use

app.beginUndoGroup();
<some code>
app.executeCommand(app.findMenuCommandId("Convert Expression to Keyframes"));
<some code>
app.endUndoGroup()

in my javascript;

after run my script,

I use keyboard shortcut "Ctrl + M" add a comp to render queue;

then I use "Ctrl + Z" want to undo add comp to render queue;

but AE told me "Undo group mismatch, will attempt to fix";

and AE back to before run my script;

in my other script, I found

app.project.renderQueue.render()

this function will affect undo group,

did convert expression will affect undo group too ?

any other command else ??