Hi,

I don't know why this inverse spikes are happening. These are photos that LRtimelapse is not applying the edit to, but I don't understand why this is happening.

Thank you.

That images seem to have a very high contrast, are they square or do you have that huge black border? I ask because you should definitely set a reference area in such situations to the are in the center, where the stadion is. Otherwise the curve will reflect the combined luminosity of the dark and bright areas and especially if you do crazy contrast editing in Lightroom you might introduce contrast flicker, as I explained in expert tips #5: https://lrtimelapse.com/tutorial/expert
Check that out. Also make sure to have the latest Adobe DNG Converter installed: https://lrtimelapse.com/install/

In any case I would do the workflow from scratch. Start by removing the sequence from Lightroom and doing "Metadata / Initialize" in LRT.
Then carefully follow the workflow explained in https://lrtimelapse.com/workflow/visual
I don't think you need so many keyframes. Make sure to set the number of keyframes in the keyframes wizard only to the number that you need.
I hope with this two tips you will get everything going.

Thank you for your reply.

They are 4:3, vertical (there are no black borders). I did not due high contrast editing, and I have only used the curves, not the highlights/shadows.

I have done it from scratch 3 times already. I have sued 20 keyframes because the stadium is closing, but I will try with less.

Using less keyframes helped a lot, but still don't understand why the few dips. Those dips are photos that lrtimelapse did not apply edits to.

PS: I can't attach a new screenshot?

Could you please check one of those images with the "dip" manually? Find in in Lightroom, check the settings and compare it with the develop settings that you see in the table. If they correspond, that means, that LRTimelapse is applying the same settings. You can double check this, by changing for example the exposure in Lightroom for that single frame, hitting Ctrl.S (or CMD S on Mac) and observing what happens in LRTimelapse. It should automatically apply this setting to the Visual Preview of that single image then also.
If you really think that LRTimelapse is doing something wrong here, then send me the log file after doing the whole workflow until the visual previews (info menu / show log).