QGIS » QGIS Application

I loaded a point dataset into QGis 3 from an ACSII text file. I then regenerated the point file as I'd put it in the wrong place. I clicked the refresh button on the toolbar and my points moved to the new location as expected. However on selecting the Identify Features tool I was only able to select points that would have lain within the original limits of the data prior to the refresh. I saved the project, exited and opened it up again and could select all points.

Without looking at the code my interpretation would be that on importing the data a metaarray was created with the X and Y limits of that dataset. On refreshing using the same date file name and structure but with different data points the metaarray is not being updated?? I suspect this is also the cause of an older issue with QGis 2 in that refreshing a file with the same file name and structure but more points only plots the number of points in the initial input file. We have worked around that by removing that object from the Layers and then re-loading it from scratch. The downside is that if you have created a thematic map using that data you have to go through the process of reclassifing it in its Properties.