Lightroom Re-ordering My images Within Collection???

[brendan_bullock]

I have been dealing with a frustrating issue the last couple of months and can't seem to figure it out.  When editing a big project (1000+ images) I create a collection with my selects, and then as I go through and finish the edits, I star and color code them.  After everything is finished, I go through to check the custom ordering of images before I export, and have been finding that Lightroom randomly has moved specific images around within the collection.  They are usually (but not always) images that I have color coded Red - and its not ALL reds, just a couple here and there which have been moved around.  That random re-sorting doesn't seem to follow any pattern I can see - ie they are not getting moved due to filename, capture time, etc.  Just a few oddballs moved around here and there throughout the collection.  Never encountered this issue in many years of using LR.  Is this a bug or am I causing it somehow?  Any help greatly appreciated!

[SeanMcCormack]

There's a discussion going about custom sorting where Lightroom does have a limit on it. 

It was 52 changes,  but was extended, however it still has limits close to what you're suggesting. 

https://feedback.photoshop.com/photoshop_family/topics/lightroom-major-bug-with-custom-sort-order

[brendan_bullock]

Thanks for letting me know this is a known bug Sean. I can imagine I'm not the only one for whom custom ordering within a collection is not only a convenience but a professional necessity.... While I'm glad its a known bug I hope that Adobe will hop on it with the next LR release. It creates many unnecessarily frustrating hours of work for me with every project that I complete. Cheers, BB