I installed a Photoshop CC update. I went into Lightroom and tried to open an image via Edit in Photoshop but it didn't open, it just created a TIFF image in Lightroom. It worked on Friday so I can only think that it was something in the update that has impacted it.
Is there a way to reverse the update?
Moving to correct forum.
This is a known bug in LR CC 2015.7 that Adobe has acknowledged: Lightroom 6.7: Opening photos in Photoshop from Lightroom using Edit In does not work correctly for some operations | Ph… Please add your me-too vote and own detailed opinion to make it more likely Adobe will prioritize a fix and ensure you'll get notified.
Meanwhile, start Photoshop manually before trying to invoke the LR Edit In command -- that works for most people.