CryoET grid image not displayed

Reported by @svensson
https://data2.esrf.fr/investigation/1218042113/datasets

• select insectcells-leica-g2-2_Position_1_test2 : the images are not displayed for the grid
• works for grid1_Position_1

we suspect that it is based on the filename which should contain the grid name, but in some cases the grid names is not append in the filename (it comes from the instrument). We cannot rely on it.

=> image with search in the name and for the first position