It's been several months since I finished transferring a large number of.asc files into the Lidar folder of my route plugin. The last few days I have been pressing on creating some new tiles and applying the Lidar data to them. More than half of these tiles had massive vertical peaks in parts of them which I realised must be due to the corresponding Lidar files somehow becoming corrupted in the editor. I've had to study the tile layout on QGIS several times to try and find out which files must be faulty and fortunately it has been enough to delete these files in the editor and then replace them from a stored folder. Has anyone else seen similar problems?