I actually didn't know this, either - but a friend that I delivered some plants to, had one - which is how I know this. I tried it, too, but didn't have any luck. (His was green.) It looked to be a medium-sized leaf - he said it broke off of a plant he had moved, and he didn't know it would root, but tried it anyway, and it was sitting in a cup of water - with many roots. The (two) that I tried, were OLD, huge leaves from my variegated Thai Constellation which were old and browning - which might have led to my non-success.

propagating in water, however these stems are nearly 2-3 foot long! ==>>> imo ... you will never grow enough roots to succeed with cuttings of that size ... especially long term.. in water ... watch a few of these vids ... and take note of the size they are using ... and how to do it in media... rather than water ... and then take at least one of the huge cuttings and cut it up and do it ... this plant should be pretty easy to succeed with.. if you do it the right way ... ken almost forgot the link: https://duckduckgo.com/?q=monstera+propagation&t=ffcm&iax=videos&ia=videos

when i get a new plant.. i let it get de stressed from shipping from grower.. to seller.. to taking it home.. for at least a few weeks or months ... and then i decide to mess with it.. and stress it again.. this would include repotting.. or things like you mention ... i dont really understand what you mean by your words... so i agree we need a pic or two to discuss such ... ken

Chimeras or chimeric plants occur when cells of more than one genotype are found growing adjacent in the plant's tissues. The most common types of chimeras present as variegations, which provide the example most often used to explain variegations and chimeras.  While the shoot apical apical meristem (area near branch/ stem tips where extension growth originates) produces all leaf cells, some of the cells will be conspicuous because of an inability to synthesize chlorophyll (green pigment). So even though the cells are all part of the leaf's tissues cells of one genotype will be green, while others are white (or nearly so).  Not all chimeric variegations are entirely stable. Periclinal chimeras normally are very stable and are what are normally used in commerce, but it's not at all uncommon for plant parts to revert to the original genotype. USUALLY, this occurs from adventitious buds, buds which form on the plant where they are not expected to occur. Example, buds that form in leaf axils (crotch formed by the leaf and the branch/ stem/ vine it's attached to) would have a much higher probability of remaining stable than buds which form in locations other than leaf axils. So, buds that form at random on the plant, including new stems that arise from root tissues, are much more likely to revert to the original genotype. This is because adventitious buds require dedifferention of tissue and its redifferention into a new apical meristem which might not be able to reproduce the variegation throughout the rest of the plant, or in this case, the variegation formerly seen from the rest of the plant.  All you can do is wait and see.  Al Thank you tapla for easy to understand explanation