Robohelp 2019, Responsive HTML 5, Opening a page with the query rhmapno > 1000 doesn't work

We have a context sensitive help that must match an old CHM map table with ids > 1000,  1200, 1300 etc...

something like:

<alias name="IDH_OUTPUTPANELFORM" value="1000" link="../../contents/myproject/user-guide/workspace/panels/build-output-panel.htm"></alias>

The generated CHM document works properly (context map id 1000 opens the correct page)

But from the browser the link  myproject/Frameless/index.htm?rhmapno=1000 ignores the redirection.

when i change the index from 1000 to 1 the link works...but the problem now is the CHM...

There is a limit in the map id?

There is a way for extending the map id?

The only solution is to change all the id to values < 1000?

Any suggestions?

Thanks