Mode memory question

I have been experiencing weird behavior with my ThruNite Ti3 Ti.
As some may know, the V2 has a “different” UI than previous versions which would always revert to FF mode. The new version appeared to have Next-Mode-Memory. So off in medium, next on would be high.
After using it for a while, it seems as though if it “rests” long enough, it will return to FF mode as each time I used it after sitting overnight, it would come on in FF regardless of the last mode it was it.
I am now trying to determine the length of time it needs to rest to return to FF. From what I can determine it look like between 3-4 hours.
Ever heard of a situation like this??

Yes. Search for “pencil fix” or “pencil capacitor fix”