I have observed the presentation file shared by you and the only resizing issue that I have observed is attached in image with red encircled. If this the issue you are referring to as issue. I would first suggest you to please try using Aspose.Slides for .NET 7.6.0 on your end. If there is still an issue then please share the sample application with us that I may use on end to achieved the desired presentation and reproducing the issue.
I have tried Aspose 7.6v too and still having the same issue.
I have worked with the sample code shared. Please try using following sample code on your end to serve the purpose. Please share, if I may help you further in this regard.
string threshold = GetThreshold(“Fix”, “Monitor”, “KDAverage”);
((AutoShapeEx)shape).TextFrame.Text = threshold;
((AutoShapeEx)shape).TextFrame.AutofitType = TextAutofitTypeEx.Normal;
// shape.Height = 0.70f;
Thanks a lot.