Hi Roger,
Sorry for the inconvenience caused.
Thanks for bringing this issue to our attention. I was able to reproduce the issue using the condition that you have mentioned here.
Could you please open a DirectTrac incident with regard to this with the Forum ID and Title of the Forum in the subject of the incident, so that we could log a bug report with regard to this issue and follow up you in the incident with the details regarding this defect.
Could you please use Key Zooming instead of Mouse zooming in your application.
Please take a look at the attached sample.
http://websamples.syncfusion.com/samples/Chart.Windows/F61567/main.htmThe above sample exhibit the key zooming feature in Logarithmic axes.
Please let me know if this helps.
Regards,
Rashidha.