No I haven't. The weird thing is - since you've mentioned the weight - I looked for it: they are for example 4096x4096 pixel large but only between 200 and 300 KB. The converted .jpg files are between 530 and 630 KB.

I've searched now just for *.tif files in my runtime and it turns out that I have some that work in P11P with no problem at all. but they don't "weigh" much more, around 500 KB to 1 MB.

Still there must be a reason why they all seemed to work in PP2014 but only a few in P11P. I opened them in Photoshop but I don't have a clue. I don't see any difference.